An autumnal matron.
Hawthorne.
Autumnal equinox, the time when the sun crosses the equator, as it proceeds southward, or when it passes the autumnal point. -- Autumnal point, the point of the equator intersected by the ecliptic, as the sun proceeds southward; the first point of Libra. -- Autumnal signs, the signs Libra, Scorpio, and Sagittarius, through which the sun passes between the autumnal equinox and winter solstice.
Aux`a*nom"e*ter (&?;), n. [Gr. &?; to cause to increase + -meter.] An instrument to measure the growth of plants. Goodale.
||Aux*e"sis (&?;), n. [NL., Gr. &?; increase, fr. &?;, &?;, to increase.] (Rhet.) A figure by which a grave and magnificent word is put for the proper word; amplification; hyperbole.
Aux*et"ic (&?;), a. [Gr. &?;.] Pertaining to, or containing, auxesis; amplifying.
Aux*il"iar (?; 106), a. [L. auxiliaris: cf. F. auxiliaire. See Auxiliary.] Auxiliary. [Archaic]
The auxiliar troops and Trojan hosts appear.
Pope.
Aux*il"iar, n. An auxiliary. [Archaic] Milton.
Aux*il"iar*ly, adv. By way of help. Harris.
Aux*il"ia*ry (?; 106), a. [L. auxiliarius, fr. auxilium help, aid, fr. augere to increase.] Conferring aid or help; helping; aiding; assisting; subsidiary; as auxiliary troops.
Auxiliary scales (Mus.), the scales of relative or attendant keys. See under Attendant, a. -- Auxiliary verbs (Gram.). See Auxiliary, n., 3.
Aux*il"ia*ry, n.; pl. Auxiliaries (&?;). 1. A helper; an assistant; a confederate in some action or enterprise.
2. (Mil.) pl. Foreign troops in the service of a nation at war; (rarely in sing.), a member of the allied or subsidiary force.
3. (Gram.) A verb which helps to form the voices, modes, and tenses of other verbs; -- called, also, an auxiliary verb; as, have, be, may, can, do, must, shall, and will, in English; être and avoir, in French; avere and essere, in Italian; estar and haber, in Spanish.
4. (Math.) A quantity introduced for the purpose of simplifying or facilitating some operation, as in equations or trigonometrical formulæ. Math. Dict.