Part 53

2. (Aëronautics) A small plane or surface capable of being manipulated by the pilot of a flying machine to preserve or destroy lateral balance; a hinged wing tip; a lateral stabilizing or balancing plane.

Air brush. A kind of atomizer for applying liquid coloring matter in a spray by compressed air.

Air cooling. In gasoline-engine motor vehicles, the cooling of the cylinder by increasing its radiating surface by means of ribs or radiators, and placing it so that it is exposed to a current of air. Cf. Water cooling. -- Air"- cooled`, a.

Air"craft` (?), n. sing. & pl. Any device, as a balloon, aëroplane, etc., for floating in, or flying through, the air.

Air gap. (Physics) An air-filled gap in a magnetic or electric circuit; specif., in a dynamo or motor, the space between the field-magnet poles and the armature; clearance.

Air hole. (Aëronautics) A local region in the atmosphere having a downward movement and offering less than normal support for the sustaining surfaces of a flying machine.

Air line. A path through the air made easy for aërial navigation by steady winds.

Air"man (?), n. A man who ascends or flies in an aircraft; a flying machine pilot.

Air"man*ship (?), n. Art, skill, or ability in the practice of aërial navigation.

Air"ol (?), n. (Pharm.) A grayish green antiseptic powder, consisting of a basic iodide and gallate of bismuth, sometimes used in place of iodoform. [A Trademark]

Air`sick` (?), a. Affected with aërial sickness. -- Air"sick`ness, n.

Air"wom`an (?), n. A woman who ascends or flies in an aircraft.

||Aj"a*va (?), n. (Bot.) See Ajouan.

{ ||Aj"ou*an ||Aj"ow*an } (?), n. [Written also ajwain.] [Prob. native name.] (Bot.) The fruit of Ammi Copticum, syn. Carum Ajowan, used both as a medicine and as a condiment. An oil containing thymol is extracted from it. Called also Javanee seed, Javanese seed, and ajava.

||A*la"li*a (?), n. [NL., fr. Gr. &?; priv. + &?; a talking; cf. &?; speechless.] (Med.) Inability to utter articulate sounds, due either to paralysis of the larynx or to that form of aphasia, called motor, or ataxis, aphasia, due to loss of control of the muscles of speech.

Al"bert ware. A soft ornamental terra-cotta pottery, sold in the biscuit state for decorating.

Alb Sunday. (Eccl.) The first Sunday after Easter Sunday, properly Albless Sunday, because in the early church those who had been baptized on Easter eve laid aside on the following Saturday their white albs which had been put on after baptism.

||Al*bu`mi*no"sis (?), n. [NL., fr. E. albumin.] (Med.) A morbid condition due to excessive increase of albuminous elements in the blood.

Al*cade" (?), n. Var. of Alcaid.

||Al`cal*di"a (?), n. [Sp. Alcaldía.] The jurisdiction or office of an alcalde; also, the building or chamber in which he conducts the business of his office.

||Al`cor*no"que (?), n. [Sp., cork tree.] The bark of several trees, esp. of Bowdichia virgilioides of Brazil, used as a remedy for consumption; of Byrsonima crassifolia, used in tanning; of Alchornea latifolia, used medicinally; or of Quercus ilex, the cork tree.

Al"der fly. 1. Any of numerous neuropterous insects of the genus Sialis or allied genera. They have aquatic larvæ, which are used for bait.

2. (Angling) An artificial fly with brown mottled wings, body of peacock harl, and black legs.

Al"dol (?), n. [Aldehyde + - ol as in alcohol.] (Chem.) A colorless liquid, C4H8O2, obtained by condensation of two molecules of acetaldehyde: CH3CHO + CH3CHO = H3CH(OH)CH2CO; also, any of various derivatives of this. The same reaction has been applied, under the name of aldol condensation, to the production of many compounds.

||Al"em (?), n. [Turk. 'alem, fr. Ar. 'alam.] (Mil.) The imperial standard of the Turkish Empire.

{ A*lep"po boil, button, or evil }. (Med.) A chronic skin affection terminating in an ulcer, most commonly of the face. It is endemic along the Mediterranean, and is probably due to a specific bacillus. Called also Aleppo ulcer, Biskara boil, Delhi boil, Oriental sore, etc.

Aleppo grass. (Bot.) One of the cultivated forms of Andropogon Halepensis (syn. Sorghum Halepense). See Andropogon, below.

A*leu"ro*nat (?), n. [See Aleurone.] Flour made of aleurone, used as a substitute for ordinary flour in preparing bread for diabetic persons.