n. Same as Acephal. [ 1913 Webster ]

a. (Zool.) Belonging to the Acephala. [ 1913 Webster ]

n. 1. a strong soft crease-resistant fabric. [ WordNet 1.5 ]

‖n. [ Sp. ] A Spanish red wine made of the first ripe grapes. [ 1913 Webster ]

‖n. [ Sp., prop. p. of adelantar to advance, to promote. ] A governor of a province; a commander. Prescott. [ 1913 Webster ]

{ . } (Aëronautics) A small plane or surface, usually capable of adjustment but not of manipulation, for preserving lateral balance in an aëroplane or flying machine. [ Webster 1913 Suppl. ]

n. [ aëro- + plane. ] (Aëronautics) 1. A light rigid plane used in aërial navigation to oppose sudden upward or downward movement in the air, as in gliding machines; specif., such a plane slightly inclined and driven forward as a lifting device in some flying machines. Also called airfoil. [ Webster 1913 Suppl. ]

2. Hence: A heavier-than-air flying machine using such a device to provide lift; an airplane. In a modern aeroplane, the airfoils are called the wings, and most of the lift is derived from these surfaces. In contrast to helicopters, the wings are fixed to the passenger compartment (airframe) and do not move relative to the frame; thus such a machine is called a fixed-wing aircraft. These machines are called monoplanes, biplanes, triplanes, or quadruplanes, according to the number of main supporting planes (wings) used in their construction. After 1940 few planes with more than one airfoil were constructed, and these are used by hobbyists or for special purposes. Being heavier than air they depend for their levitation on motion imparted by the thrust from either propellers driven by an engine, or, in a jet plane, by the reaction from a high-velocity stream of gases expelled rearward from a jet engine. They start from the ground by a run on small wheels or runners, and are guided by a steering apparatus consisting of horizontal and vertical movable planes, which usually form part of the wings or tail. There are many varieties of form and construction, which in some cases are known by the names of their inventors. In U.S., an aeroplane is usually called an airplane or plane. [ Webster 1913 Suppl. +PJC ]

n. One who flies in an aëroplane.
Syn. -- aviator, aviatrix, airman. [ Webster 1913 Suppl. ]

n. Same as Ailantus. [ 1913 Webster ]

n. [ From aylanto, i. e., tree of heaven, the name of the tree in the Moluccas. ] (Bot.) A genus of beautiful trees, natives of the East Indies. The tree imperfectly diœcious, and the staminate or male plant is very offensive when blossom. [ 1913 Webster ]

n. a heavier-than-air aircraft. Same as aeroplane{ 2 }. [ PJC ]

n. a propeller designed for propelling airplanes.
Syn. -- airscrew, propeller, prop. [ WordNet 1.5 +PJC ]

(Bot.) A plant deriving its sustenance from the air alone; an aërophyte. [ 1913 Webster ]

☞ The “Florida moss” (Tillandsia, many tropical orchids, and most mosses and lichens are air plants. Those which are lodged upon trees, but not parasitic on them, such as the Spanish moss Tillandsia usneoides), are epiphytes. [ 1913 Webster ]

n. [ OF. alan, alant; cf. Sp. alano. ] A wolfhound. [ Obs. ] Chaucer. [ 1913 Webster ]

adv. [ Pref. a- + land. ] On land; to the land; ashore. “Cast aland.” Sir P. Sidney. [ 1913 Webster ]

n. [ Aldehyde + the ending -ine. The -n- is a euphonic insertion. ] (Chem.) one of the natural amino acids found combined in the proteins of most living tissues. It can be isolated as a white crystalline base, C3H7NO2. The natural form is the L-configuration. [ 1913 Webster +PJC ]

n. [ G. alant elecampane, the Inula helenium of Linnæus. ] (Chem.) See Inulin. [ 1913 Webster ]

n. [ From T. Allan, who first distinguished it as a species. ] (min.) A silicate containing a large amount of cerium. It is usually black in color, opaque, and is related to epidote in form and composition. [ 1913 Webster ]

a. [ Cf. F. allantoïque. ] Pertaining to, or contained in, the allantois. [ 1913 Webster ]

Allantoic acid. (Chem.) See Allantoin. [ 1913 Webster ]

{ ‖ } n.. (Anat.) A membranous appendage of the embryos of mammals, birds, and reptiles, -- in mammals serving to connect the fetus with the parent; the urinary vesicle. [ 1913 Webster ]

{ } a. [ Gr. &unr_; shaped like a sausage; &unr_; sausage + e'i^dos form. ] (Anat.) Of or pertaining to the allantois. [ 1913 Webster ]

‖n. pl. [ NL. ] (Zool.) The division of Vertebrata in which the embryo develops an allantois. It includes reptiles, birds, and mammals. [ 1913 Webster ]

n. (Chem.) A crystalline, transparent, colorless substance found in the allantoic liquid of the fetal calf; -- formerly called allantoic acid and amniotic acid. [ 1913 Webster ]

a. [ L. altivolans. See Volant. ] Flying high. [ Obs. ] Blount. [ 1913 Webster ]

n. [ F. ambulance, hôpital ambulant, fr. L. ambulare to walk. See Amble. ] (Mil.) (a) A field hospital, so organized as to follow an army in its movements, and intended to succor the wounded as soon as possible. Often used adjectively; as, an ambulance wagon; ambulance stretcher; ambulance corps. (b) An ambulance wagon or cart for conveying the wounded from the field, or to a hospital. [ 1913 Webster ]

a. [ L. ambulans, p. pr. of ambulare to walk: cf. F. ambulant. ] Walking; moving from place to place. Gayton. [ 1913 Webster ]

n. 1. 1 a genus of North American deciduous trees or shrubs.
Syn. -- genus Amelanchier. [ WordNet 1.5 ]

. In hotels, aplan upon which guests pay for both room and board by the day, week, or other convenient period; -- contrasted with European plan. [ Webster 1913 Suppl. ]

n. a sign language, used in the United States mostly by the deaf or for communication with the deaf, in which gestures made with the hands symbolize words, alphabetical letters, or ideas, permitting rapid communication in the absence of speech.
Syn. -- Ameslan. [ PJC ]

n. 1. American sign language. [ An acronym which is spelled and pronounced as a simple word ]
Syn. -- American sign language [ PJC ]

a. (Anat.) Without, or not developing, an allantois. [ 1913 Webster ]

‖n. pl. [ Gr. 'an priv. + E. allantoidea. ] (Zool.) The division of Vertebrata in which no allantois is developed. It includes amphibians, fishes, and lower forms. [ 1913 Webster ]

n. 1. a native or inhabitant of the island of Anguilla in the West Indies. [ WordNet 1.5 ]

adj. 1. of or pertaining to Anguilla; as, Anguillan sea food specialties. [ WordNet 1.5 ]

2. of, pertaining to, or characteristic of Anguillans or Anguilla; as, The Anguillan population of the islands. [ WordNet 1.5 ]

n. [ Gr. &unr_; not loving man; 'a priv. + &unr_; to love + &unr_; man. ] Want of love to mankind; -- the opposite of philanthropy. Coxe. [ 1913 Webster ]

a. [ Gr. 'a priv. + &unr_; disposed to wander, wandering, &unr_; to wander. ] (Opt.) Having two or more parts of different curvatures, so combined as to remove spherical aberration; -- said of a lens. [ 1913 Webster ]

Aplanatic focus of a lens (Opt.), the point or focus from which rays diverging pass the lens without spherical aberration. In certain forms of lenses there are two such foci; and it is by taking advantage of this fact that the best aplanatic object glasses of microscopes are constructed. [ 1913 Webster ]

n. Freedom from spherical aberration. [ 1913 Webster ]

n. (Bot.) A nonmotile gamete, found in certain lower algæ. [ Webster 1913 Suppl. ]

n. An appellant. [ Obs. ] Shak. [ 1913 Webster ]

n. Capability of appeal. [ 1913 Webster ]

a. [ L. appellans, p. pr. of appellare; cf. F. appelant. See Appeal. ] Relating to an appeal; appellate. “An appellant jurisdiction.” Hallam. [ 1913 Webster ]

Party appellant (Law), the party who appeals; appellant; -- opposed to respondent, or appellee. Tomlins. [ 1913 Webster ]

n. 1. (Law) (a) One who accuses another of felony or treason. [ Obs. ] (b) One who appeals, or asks for a rehearing or review of a cause by a higher tribunal. [ 1913 Webster ]

2. A challenger. [ Obs. ] Milton. [ 1913 Webster ]

3. (Eccl. Hist.) One who appealed to a general council against the bull Unigenitus. [ 1913 Webster ]

4. One who appeals or entreats. [ 1913 Webster ]

(Zool.) The five united jaws and accessory ossicles of certain sea urchins. [ 1913 Webster ]

adv. & a. [ Pref. a- + slant. ] Toward one side; in a slanting direction; obliquely. [ 1913 Webster ]

[ The shaft ] drove through his neck aslant. Dryden. [ 1913 Webster ]

prep. In a slanting direction over; athwart. [ 1913 Webster ]

There is a willow grows aslant a brook. Shak. [ 1913 Webster ]

a. [ F. assaillant, p. pr. of assaillir. ] Assailing; attacking. Milton. [ 1913 Webster ]

n. [ F. assaillant. ] One who, or that which, assails, attacks, or assaults; an assailer. [ 1913 Webster ]

An assailant of the church. Macaulay. [ 1913 Webster ]

n. [ Cf. OF. assemblance. ] 1. Resemblance; likeness; appearance. [ Obs. ] [ 1913 Webster ]

Care I for the . . . stature, bulk, and big assemblance of a man? Give me the spirit. Shak. [ 1913 Webster ]

2. An assembling; assemblage. [ Obs. ] [ 1913 Webster ]

To weete [ know ] the cause of their assemblance. Spenser. [ 1913 Webster ]

n. 1. (Computers) an artificial computer language with mnemonic codes representing the basic machine-language instructions of a computer, which can be interpreted by an assembler to produce a computer program in machine language. Also informally referred to as assembler. Writing a program in assembly language is very much simpler than writing the machine instructions in binary code, and the use of such a language greatly increases the efficiency of the process of writing computer programs. See also programming language, FORTRAN, BASIC. [ PJC ]

a. [ L. Atellanus, fr. Atella, an ancient town of the Osci, in Campania. ] Of or pertaining to Atella, in ancient Italy; as, Atellan plays; farcical; ribald. -- n. A farcical drama performed at Atella. [ 1913 Webster ]