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 ]

prop. n. A natural family of fish comprising the bonefish.
Syn. -- family Albulidae. [ WordNet 1.5 ]

n. [ LL. alidada, alhidada, fr. Ar. al-'idāda a sort of rule: cf. F. alidade. ] The portion of a graduated instrument, as a quadrant or astrolabe, carrying the sights or telescope, and showing the degrees cut off on the arc of the instrument Whewell. [ 1913 Webster ]

n. 1. 1 a family of flowering plants including the snowdrop, narcissus, and daffodil; in some classification systems considered a subfamily of the Liliaceae.
Syn. -- family Amaryllidaceae, amaryllis family [ WordNet 1.5 ]

{ } 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. a natural family of eels that live in fresh water as adults but return to the sea to spawn.
Syn. -- family Anguillidae. [ WordNet 1.5 ]

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 One of a class of compounds which may be regarded as amides in which more or less of the hydrogen has been replaced by phenyl.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 ]

‖n. pl. [ NL. See Annelid. ] (Zool.) A division of the Articulata, having the body formed of numerous rings or annular segments, and without jointed legs. The principal subdivisions are the Chætopoda, including the Oligochæta or earthworms and Polychæta or marine worms; and the Hirudinea or leeches. See Chætopoda. [ 1913 Webster ]

{ } a. [ F. annélide, fr. anneler to arrange in rings, OF. anel a ring, fr. L. anellus a ring, dim. of annulus a ring. ] (Zool.) Of or pertaining to the Annelida. -- n. One of the Annelida. [ 1913 Webster ]

a. (Zool.) Of the nature of an annelid. [ 1913 Webster ]

prop. n. A natural family of soil and freshwater protozoa; cosmopolitan.
Syn. -- family Arcellidae. [ WordNet 1.5 ]

‖n. pl. [ NL.; pref. archi- + annelida. ] (Zool.) A group of Annelida remarkable for having no external segments or distinct ventral nerve ganglions. [ 1913 Webster ]

n. 1. 1 a family comrising the pill bugs.
Syn. -- family Armadillidiidae. [ WordNet 1.5 ]

n. 1. 1 the type genus of the Armadillidiidae.
Syn. -- genus Armadillidium. [ WordNet 1.5 ]

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 ]

a. Slipping back; falling back into sin or error; sinning. [ 1913 Webster ]

Turn, O backsliding children, saith the Lord. Jer. iii. 14. [ 1913 Webster ]

n. The act of one who backslides; abandonment of faith or duty. [ 1913 Webster ]

Our backslidings are many. Jer. xiv. 7. [ 1913 Webster ]

n. (Astron.) See Andromede and cf. Biela's comet. [ Webster 1913 Suppl. +PJC ]

The time between daylight and candle light. [ Humorous ] [ 1913 Webster ]

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

n. a natural family of chiefly deep-sea fishes related to the Ophidiidae.
Syn. -- family Brotulidae. [ WordNet 1.5 ]

a. [ L. calidus, fr. calere to be hot. ] Hot; burning; ardent. [ Obs. ] Bailey. [ 1913 Webster ]

n. Heat. [ Obs. ] [ 1913 Webster ]

n. [ See Caloriduct. ] A pipe or duct used to convey hot air or steam. [ 1913 Webster ]

Subterranean caliducts have been introduced. Evelyn. [ 1913 Webster ]

a. [ L. callidus, fr. callere to be thick-skinned, to be hardened, to be practiced, fr. callum, callus, callous skin, callosity, callousness. ] Characterized by cunning or shrewdness; crafty. [ R. ] [ 1913 Webster ]

n. [ L. calliditas. ] Acuteness of discernment; cunningness; shrewdness. [ R. ] [ 1913 Webster ]

Her eagly-eyed callidity. C. Smart. [ 1913 Webster ]

n. a natural family comprising the camels and llamas and vicunas.
Syn. -- family Camelidae. [ WordNet 1.5 ]

n. a group of families of mostly flowers having basal or free-central placentation and trinucleate pollen (binucleate pollen is commoner in flowering plants); it contains 14 families including: Caryophyllaceae (carnations and pinks); Aizoaceae; Amaranthaceae; Batidaceae; Chenopodiaceae; Cactaceae (order Opuntiales); Nyctaginaceae; Phytolaccaceae; it corresponds approximately to order Caryophyllales; it is sometimes classified as a superorder.
Syn. -- subclass Caryophyllidae. [ WordNet 1.5 ]

n. [ Gr. &unr_;, &unr_; stain, spot + -graphy: cf. F. célidographie. ] A description of apparent spots on the disk of the sun, or on planets. [ 1913 Webster ]

n. [ NL., fr. Gr. chelidw`n. ] (Anat.) The hollow at the flexure of the arm. [ 1913 Webster ]

a. [ See Celandine. ] (Chem.) Of, pertaining to, or derived from, the celandine. [ 1913 Webster ]

Chelidonic acid, a weak acid extracted from the celandine (Chelidonium majus), as a white crystalline substance. [ 1913 Webster ]

n. a genu having only one species; the greater celandine.
Syn. -- genus Chelidonium. [ WordNet 1.5 ]

‖n. [ L. (sc. lapillus.) ] A small stone taken from the gizzard of a young swallow. -- anciently worn as a medicinal charm. [ 1913 Webster ]

n. a natural family of small bushy-tailed South American burrowing rodents.
Syn. -- family Chinchillidae. [ WordNet 1.5 ]

a. Pertaining to a chrysalis; resembling a chrysalis. [ 1913 Webster ]

n.; pl. Chrysalids. See Chrysalis. [ 1913 Webster ]

n. a natural family comprising the leafhoppers.
Syn. -- family Cicadellidae. [ WordNet 1.5 ]

n. a natural family of birds comprising the water ouzels, also called dippers, which dive under water in flowing streams.
Syn. -- family Cinclidae. [ WordNet 1.5 +PJC ]

‖n. [ NL., prob. from Gr. klei`s key. ] (Paleon.) A genus of extinct marine reptiles, allied to the Mosasaurus. See Illust. in Appendix. [ 1913 Webster ]

n. a natural family of insects including the ladybugs.
Syn. -- family Coccinellidae. [ WordNet 1.5 ]

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. [ Gr. ko`lla glue. ] (Chem.) One of a class of organic bases, C8H11N, usually pungent oily liquids, belonging to the pyridine series, and obtained from bone oil, coal tar, naphtha, and certain alkaloids. [ 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; -- called also colliding-beam accelerator and collider. 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; collider. [ WordNet 1.5 +PJC ]

n. (Zool.) Any crinoid of the genus Antedon or allied genera. [ 1913 Webster ]

a. [ L. consolidans, p. pr. of consolidare: cf. F. consolidant. ] Serving to unite or consolidate; having the quality of consolidating or making firm. [ 1913 Webster ]

a. [ L. consolidatus, p. pr. of consolidare to make firm; con- + solidare to make firm; solidus solid. See Solid, and cf. Consound. ] Formed into a solid mass; made firm; consolidated. [ R. ] [ 1913 Webster ]

A gentleman [ should learn to ride ] while he is tender and the brawns and sinews of his thighs not fully consolidate. Elyot. [ 1913 Webster ]

v. t. [ imp. & p. p. Consolidated p. pr. & vb. n. Consolidating ] 1. To make solid; to unite or press together into a compact mass; to harden or make dense and firm. [ 1913 Webster ]

He fixed and consolidated the earth. T. Burnet. [ 1913 Webster ]

2. To unite, as various particulars, into one mass or body; to bring together in close union; to combine; as, to consolidate the armies of the republic. [ 1913 Webster ]

Consolidating numbers into unity. Wordsworth. [ 1913 Webster ]

3. (Surg.) To unite by means of applications, as the parts of a broken bone, or the lips of a wound. [ R. ]

Syn. -- To unite; combine; harden; compact; condense; compress. [ 1913 Webster ]