n. [ Acetyl + anilide. ] (Med., Chem.) An amide formed from aniline and an acetyl group (C6H5.NH.CO.CH3); it is a white crystalline compound used as an analgesic and also as an antipyretic. It has molecular weight 135.16. [ Written also acetanilid ] AS
Syn. -- phenylacetamide, N-phenylacetamide, antifebrin, antifebrine, acetylaminobenzene, acetylaniline [ 1913 Webster + WordNet 1.5 + AS ]

{ } a. (Bot.) Of, pertaining to, or resembling, an order of plants differing from the lily family chiefly in having the ovary below the petals. The narcissus and daffodil are members of this family. [ 1913 Webster ]

n. (Chem.) One of a class of compounds which may be regarded as amides in which more or less of the hydrogen has been replaced by phenyl. [ 1913 Webster ]

v. i. [ imp. Backslid p. p. Backslidden Backslid; p. pr. & vb. n. Backsliding. ] [ Back, adv. + slide. ] To slide back; to fall away; esp. to abandon gradually the faith and practice of a religion that has been professed. [ 1913 Webster ]

n. One who backslides. [ 1913 Webster ]

n. [ F. See Bolis. ] A kind of meteor; a bolis. [ 1913 Webster ]

v. i. [ L. collidere, collisum; col- + laedere to strike. See Lesion. ] To strike or dash against each other; to come into collision; to clash; as, the vessels collided; their interests collided. [ 1913 Webster ]

Across this space the attraction urges them. They collide, they recoil, they oscillate. Tyndall. [ 1913 Webster ]

No longer rocking and swaying, but clashing and colliding. Carlyle. [ 1913 Webster ]

v. t. To strike or dash against. [ Obs. ] [ 1913 Webster ]

Scintillations are . . . inflammable effluencies from the bodies collided. Sir T. Browne. [ 1913 Webster ]

n. (Physics) a particle accelerator in which two separate beams of particles (usually of opposite charge) are circulated in opposite directions and directed so as to collide head on. This technique allows the production of collisions of higher energy than would be possible with a single beam produced by the same device.
Syn. -- particle collider; colliding-beam accelerator; colliding-beam machine. [ WordNet 1.5 +PJC ]

n. (Chem.) A white amorphous substance, regarded as a polymeric modification of isocyanic acid. [ 1913 Webster ]

n. [ Gr. ky`klos circle. ] (Geom.) A surface of the fourth degree, having certain special relations to spherical surfaces. The tore or anchor ring is one of the cyclides. [ 1913 Webster ]

v. t. [ imp. & p. p. Elided; p. pr. & vb. n. Eliding. ] [ L. elidere to strike out or off; e + laedere to hurt by striking: cf. F. élider. See Lesion. ] 1. To break or dash in pieces; to demolish; as, to elide the force of an argument. [ Obs. ] Hooker. [ 1913 Webster ]

2. (Gram.) To cut off, as a vowel or a syllable, usually the final one; to subject to elision. [ 1913 Webster ]

(Chem.) An unsymmetrical, divalent, hydrocarbon radical, C2H4 metameric with ethylene but written thus, CH3.CH= to distinguish it from the symmetrical ethylene, CH2=CH2. Its compounds are derived from aldehyde. Formerly called also ethidene. [ 1913 Webster ]

n. (Zool.) The glede or kite. [ 1913 Webster ]

v. i. [ imp. & p. p. Glided; p. pr. & vb. n. Gliding. ] [ AS. glīdan; akin to D. glijden, OHG. glītan, G. gleiten, Sw. glida, Dan. glide, and prob. to E. glad. ] [ 1913 Webster ]

1. To move gently and smoothly; to pass along without noise, violence, or apparent effort; to pass rapidly and easily, or with a smooth, silent motion, as a river in its channel, a bird in the air, a skater over ice. [ 1913 Webster ]

The river glideth at his own sweet will. Wordsworth. [ 1913 Webster ]

2. (Phon.) To pass with a glide, as the voice. [ 1913 Webster ]

3. (Aëronautics) To move through the air by virtue of gravity or momentum; to volplane. [ Webster 1913 Suppl. ]

n. 1. The act or manner of moving smoothly, swiftly, and without labor or obstruction. [ 1913 Webster ]

They prey at last ensnared, he dreadful darts,
With rapid glide, along the leaning line. Thomson. [ 1913 Webster ]

Seeing Orlando, it unlink'd itself,
And with indented glides did slip away. Shak. [ 1913 Webster ]

2. (Phon.) A transitional sound in speech which is produced by the changing of the mouth organs from one definite position to another, and with gradual change in the most frequent cases; as in passing from the begining to the end of a regular diphthong, or from vowel to consonant or consonant to vowel in a syllable, or from one component to the other of a double or diphthongal consonant (see Guide to Pronunciation, §§ 19, 161, 162). Also (by Bell and others), the vanish (or brief final element) or the brief initial element, in a class of diphthongal vowels, or the brief final or initial part of some consonants (see Guide to Pronunciation, §§ 18, 97, 191). [ 1913 Webster ]

☞ The on-glide of a vowel or consonant is the glidemade in passing to it, the off-glide, one made in passing from it. Glides of the other sort are distinguished as initial or final, or fore-glides and after-glides. For voice-glide, see Guide to Pronunciation, §§ 17, 95. [ 1913 Webster ]

3. (Aëronautics) Movement of a glider, aëroplane, etc., through the air under gravity or its own movement. [ Webster 1913 Suppl. ]

obs. p. p. of Glide. Chaucer. [ 1913 Webster ]

n. (Aeronautics) the proper path for an airplane approaching a landing strip; also called glide slope. [ PJC ]

n. 1. One who, or that which, glides. [ 1913 Webster ]

2. a heavier-than-air flying machine similar to an airplane, but without an engine. It is typically towed to a high altitide by a powered aircraft and then glides to earth with no other source of power. [ PJC ]

3. a type of seat used on porches or in gardens, which is mounted on a frame so that it may glide forward and backward. [ PJC ]

n. (Aeronautics) 1. the proper path for an airplane approaching a landing strip; also called glide path. [ PJC ]

2. The path indicated by a radio beacon as the proper path for an airplane to use in approaching a landing strip. [ PJC ]

n. [ Glycol + anhydride. ] (Chem.) A white amorphous powder, C4H4O, obtained by heating and dehydrating glycolic acid. [ Written also glycollide. ] [ 1913 Webster ]

‖n. [ F. ] See Invalid, n. [ 1913 Webster ]

{ } n. 1. The slipping down of a mass of land from a mountain, hill, etc. [ 1913 Webster ]

2. The land which slips down. [ 1913 Webster ]

3. An election victory in which the winning candidate receives a substantial majority of the votes, usually meaning at least ten per cent more than any opposing candidate. [ PJC ]

4. Any overwhelming victory. [ PJC ]

n. (Chem.) A colorless liquid hydrocarbon, having a garlic odor; heptine. [ 1913 Webster ]

v. i. To slide outward, onward, or forward; to advance by sliding. [ Poetic ] [ 1913 Webster ]

At last our grating keels outslide. Whittier. [ 1913 Webster ]

v. t. To glide over. Wyatt. [ 1913 Webster ]

v. t. To slide over or by. [ 1913 Webster ]

n. [ Oxalic + aniline + amide. ] (Chem.) A white crystalline substance, resembling oxanilamide, obtained by heating aniline oxalate, and regarded as a double anilide of oxalic acid; -- called also diphenyl oxamide. [ 1913 Webster ]

n. [ Phthalyl + anhydride. ] (Chem.) A lactone (C8H6O2) obtained as a white crystalline substance by reduction of phthalyl chloride and other processes; hence, by extension, any one of the series of which phthalide proper is the type. [ Written also phthalid. ] [ 1913 Webster ]

[ PJC ]

2. Specifically: A fungicide (C8H2Cl4O2) which is a tetrachloro derivative of phthalide{ 1 } proper; in this sense, the spelling fthalide is also used. It has CAS Registry Number 27355-22-2.
Syn. 4, 5, 6, 7-tetrachloro-1(3H)-isobenzofuranone; -- . [ PJC ]

n. (Chem.) See Propidene. [ 1913 Webster ]

n. [ Salicylic + anhydride. ] (Chem.) A white crystalline substance obtained by dehydration of salicylic acid. [ 1913 Webster ]

n. (Med.) Any affection of the skin dependent on scrofula. [ 1913 Webster ]

v. t. [ imp. Slid p. p. Slidden Slid; p. pr. & vb. n. Slidding ] [ OE. sliden, AS. slīdan; akin to MHG. slīten, also to AS. slidor slippery, E. sled, Lith. slidus slippery. Cf. Sled. ] 1. To move along the surface of any body by slipping, or without walking or rolling; to slip; to glide; as, snow slides down the mountain's side. [ 1913 Webster ]

2. Especially, to move over snow or ice with a smooth, uninterrupted motion, as on a sled moving by the force of gravity, or on the feet. [ 1913 Webster ]

They bathe in summer, and in winter slide. Waller. [ 1913 Webster ]

3. To pass inadvertently. [ 1913 Webster ]

Beware thou slide not by it. Ecclus. xxviii. 26. [ 1913 Webster ]

4. To pass along smoothly or unobservedly; to move gently onward without friction or hindrance; as, a ship or boat slides through the water. [ 1913 Webster ]

Ages shall slide away without perceiving. Dryden. [ 1913 Webster ]

Parts answering parts shall slide into a whole. Pope. [ 1913 Webster ]

5. To slip when walking or standing; to fall. [ 1913 Webster ]

Their foot shall slide in due time. Deut. xxxii. 35. [ 1913 Webster ]

6. (Mus.) To pass from one note to another with no perceptible cassation of sound. [ 1913 Webster ]

7. To pass out of one's thought as not being of any consequence. [ Obs. or Colloq. ] [ 1913 Webster ]

With good hope let he sorrow slide. Chaucer. [ 1913 Webster ]

With a calm carelessness letting everything slide. Sir P. Sidney. [ 1913 Webster ]

v. t. 1. To cause to slide; to thrust along; as, to slide one piece of timber along another. [ 1913 Webster ]

2. To pass or put imperceptibly; to slip; as, to slide in a word to vary the sense of a question. [ 1913 Webster ]

n. [ AS. slīde. ] 1. The act of sliding; as, a slide on the ice. [ 1913 Webster ]

2. Smooth, even passage or progress. [ 1913 Webster ]

A better slide into their business. Bacon. [ 1913 Webster ]

3. That on which anything moves by sliding. Specifically: (a) An inclined plane on which heavy bodies slide by the force of gravity, esp. one constructed on a mountain side for conveying logs by sliding them down. (b) A surface of ice or snow on which children slide for amusement. [ 1913 Webster ]

4. That which operates by sliding. Specifically: (a) A cover which opens or closes an aperture by sliding over it. (b) (Mach.) A moving piece which is guided by a part or parts along which it slides. (c) A clasp or brooch for a belt, or the like. [ 1913 Webster ]

5. A plate or slip of glass on which is a picture or delineation to be exhibited by means of a magic lantern, stereopticon, or the like; a plate on which is an object to be examined with a microscope. [ 1913 Webster ]

6. The descent of a mass of earth, rock, or snow down a hill or mountain side; as, a land slide, or a snow slide; also, the track of bare rock left by a land slide. [ 1913 Webster ]

7. (Geol.) A small dislocation in beds of rock along a line of fissure. Dana. [ 1913 Webster ]

8. (Mus.) (a) A grace consisting of two or more small notes moving by conjoint degrees, and leading to a principal note either above or below. (b) An apparatus in the trumpet and trombone by which the sounding tube is lengthened and shortened so as to produce the tones between the fundamental and its harmonics. [ 1913 Webster ]

9. (Phonetics) A sound which, by a gradual change in the position of the vocal organs, passes imperceptibly into another sound. [ 1913 Webster ]

10. (Steam Engine) (a) Same as Guide bar, under Guide. (b) A slide valve. [ 1913 Webster ]

Slide box (Steam Engine), a steam chest. See under Steam. --
Slide lathe, an engine lathe. See under Lathe. --
Slide rail, a transfer table. See under Transfer. --
Slide rest (Turning lathes), a contrivance for holding, moving, and guiding, the cutting tool, made to slide on ways or guides by screws or otherwise, and having compound motion. --
Slide rule, a mathematical instrument consisting of two parts, one of which slides upon the other, for the mechanical performance of addition and subtraction, and, by means of logarithmic scales, of multiplication and division. --
Slide valve. (a) Any valve which opens and closes a passageway by sliding over a port. (b) A particular kind of sliding valve, often used in steam engines for admitting steam to the piston and releasing it, alternately, having a cuplike cavity in its face, through which the exhaust steam passes. It is situated in the steam chest, and moved by the valve gear. It is sometimes called a D valve, -- a name which is also applied to a semicylindrical pipe used as a sliding valve. [ 1913 Webster ]

In the illustration, a is the cylinder of a steam engine, in which plays the piston p; b the steam chest, receiving its supply from the pipe i, and containing the slide valve s, which is shown as admitting steam to one end of the cylinder through the port e, and opening communication between the exhaust passage f and the port c, for the release of steam from the opposite end of the cylinder. [ 1913 Webster ]

n. The game of shovelboard. [ Obs. ] [ 1913 Webster ]

a. See Slidder. [ Obs. ] Chaucer. [ 1913 Webster ]

n. 1. One who, or that which, slides; especially, a sliding part of an instrument or machine. [ 1913 Webster ]

2. (Zool.) The red-bellied terrapin (Pseudemys rugosa). [ Local, U. S. ] [ 1913 Webster ]

3. (Zool.) any of several North American freshwater turtles of the genus Chrysemis; some, such as Chrysemis scripta are sold commercially as pets. [ RHUD ] [ PJC ]

4. (Baseball) a fast pitch that breaks slightly just in front of the batter, in the same direction as a curve ball (i. e. , away from the side from which it was thrown). [ PJC ]

Slider pump, a form of rotary pump. [ 1913 Webster ]

n. a thin, flat calculating device consisting of a fixed outer piece and a movable middle piece. Both pieces are graduated in such a way (as, by a logarithmic scale) that multiplication, division, and other mathematical functions of an input variable may be rapidly determined by movement of the middle pieces to a location on one scale corresponding to the input value, and reading off the result on another scale. A movable window with a hairline assists in alignment of the scales. This device has been largely superseded by the electronic calculator, which has a greater precision than the slide rule. Also called colloquially slipstick. [ PJC ]

n. A way along which something slides. [ Webster 1913 Suppl. ]

n. [ F. ] (Med.) A cutaneous eruption due to syphilis. [ 1913 Webster ]

n. [ See Tropine. ] (Chem.) A liquid hydrocarbon obtained by the dry distillation of tropine with quicklime. It is regarded as being homologous with dipropargyl. [ 1913 Webster ]

a. [ Tubule + dentate. ] (Zool.) Having teeth traversed by canals; -- said of certain edentates. [ 1913 Webster ]