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The sister of one's father or mother; -- correlative to nephew or niece. Also applied to an uncle's wife.

The chamber, or one of the two chambers, of the heart, by which the blood is received and transmitted to the ventricle or ventricles; -- so called from its resemblance to the auricle or external ear of some quadrupeds. See Heart.

One of the five arched processes of the shell around the jaws of a sea urchin.

like the ear; shaped like the ear; auricled. (b) (Zoöl.) Having an angular projection on one or both sides, as in certain bivalve shells, the foot of some gastropods, etc. Auriculate leaf, one having small appended leaves or lobes on each side of its petiole or base.

One skilled in treating and curing disorders of the ear.

One who practices auscultation.

To tend toward the south pole, as a magnet. [Obs.] They [magnets] do septentrionate at one extreme, and australize at another. Sir T. Browne.

One who composes or writers a book; a composer, as distinguished from an editor, translator, or compiler. The chief glory every people arises from its authors. Johnson.

Having an air of authority; positive; dictatorial; peremptory; as, an authoritative tone. The mock authoritative manner of the one, and the insipid mirth of the other. Swift. -- Au*thor"i*ta*tive*ly, adv -- Au*thor"i*ta*tive*ness, n.

That which, or one who, is claimed or appealed to in support of opinions, actions, measures, etc. Hence:

ty, warrant, or legal power; to give a right to act; to empower; as, to authorize commissioners to settle a boundary.

, to rely for authority. [Obs.] Authorizing himself, for the most part, upon other histories. Sir P. Sidney.

One who authorizes.

A combining form, with the meaning of self, one's self, one's own, itself, its own.

One who writers his own life or biography.

One who writes his own life; an autobiographer. [R.]

A biography written by the subject of it; memoirs of one's life written by one's self.

Self-catalysis; catalysis of a substance by one of its own products, as of silver oxide by the silver formed by reduction of a small portion of it. -- Au`to*cat`a*lyt"ic (#), a.

One who is supposed to rise or spring from the ground or the soil he inhabits; one of the original inhabitants or aborigines; a native; -- commonly in the plural. This title was assumed by the ancient Greeks, particularly the Athenians.

One who rules with undisputed sway in any company or relation; a despot. The autocrat of the breakfast table. Holmes.