1) aberration,"the act of wandering; deviation, especially from truth or moral rectitude, from the natural state, or from a type.-a partial alienation of reason.-a small periodical change of position in the stars and other heavenly bodies, due to the combined effect of the motion of light and the motion of the observer; called annual aberration, when the observer's motion is that of the earth in its orbit, and daily or diurnal aberration, when of the earth on its axis; amounting when greatest, in the former case, to 20.4'', and in the latter, to 0.3''. planetary aberration is that due to the motion of light and the motion of the planet relative to the earth.-the convergence to different foci, by a lens or mirror, of rays of light emanating from one and the same point, or the deviation of such rays from a single focus; called spherical aberration, when due to the spherical form of the lens or mirror, such form giving different foci for central and marginal rays; and chromatic aberration, when due to different refrangibilities of the colored rays of the spectrum, those of each color having a distinct focus.-the passage of blood or other fluid into parts not appropriate for it.-the producing of an unintended effect by the glancing of an instrument, as when a shot intended for a glances and strikes b."

2) abraid,"to awake; to arouse; to stir or start up; also, to shout out."

3) acetone,"a volatile liquid consisting of three parts of carbon, six of hydrogen, and one of oxygen; pyroacetic spirit, -- obtained by the distillation of certain acetates, or by the destructive distillation of citric acid, starch, sugar, or gum, with quicklime."

4) acronychal,"rising at sunset and setting at sunrise, as a star; -- opposed to cosmical."

5) adambulacral,"next to the ambulacra; as, the adambulacral ossicles of the starfish."

6) affamishment,starvation.

7) affiliation,"adoption; association or reception as a member in or of the same family or society.-the establishment or ascertaining of parentage; the assignment of a child, as a bastard, to its father; filiation.-connection in the way of descent."

8) affray,"to startle from quiet; to alarm.-to frighten; to scare; to frighten away.-the act of suddenly disturbing any one; an assault or attack.-alarm; terror; fright.-a tumultuous assault or quarrel; a brawl; a fray.-the fighting of two or more persons, in a public place, to the terror of others."

9) aldebaran,"a red star of the first magnitude, situated in the eye of taurus; the bull's eye. it is the bright star in the group called the hyades."

10) algol,"a fixed star, in medusa's head, in the constellation perseus, remarkable for its periodic variation in brightness."

11) alioth,"a star in the tail of the great bear, the one next the bowl in the dipper."

12) allyl,"an organic radical, c3h5, existing especially in oils of garlic and mustard."

13) almucantar,a small circle of the sphere parallel to the horizon; a circle or parallel of altitude. two stars which have the same almucantar have the same altitude. see almacantar.

14) altitude,"space extended upward; height; the perpendicular elevation of an object above its foundation, above the ground, or above a given level, or of one object above another; as, the altitude of a mountain, or of a bird above the top of a tree.-the elevation of a point, or star, or other celestial object, above the horizon, measured by the arc of a vertical circle intercepted between such point and the horizon. it is either true or apparent; true when measured from the rational or real horizon, apparent when from the sensible or apparent horizon.-the perpendicular distance from the base of a figure to the summit, or to the side parallel to the base; as, the altitude of a triangle, pyramid, parallelogram, frustum, etc.-height of degree; highest point or degree.-height of rank or excellence; superiority.-elevation of spirits; heroics; haughty airs."

15) alula,a false or bastard wing. see under bastard.