Auxiliary | Webster's Dictionary (1865)

Aux-il'iar or Aux-il'ia-ry, a.

adjective

a. [Lat. auxiliaris, auxiliarius, from auxilium, help, aid, from augere, to increase; Fr. auxiliaire.] Conferring aid or help; helping; aiding; assisting; subsidiary; as, auxiliary troops. “To seek auxiliary force.” Pope. “An auxiliary verb.” Murray.

Auxiliary scales (Mus.), the six keys or scales, consisting of any key major, with its relative minor, and the relative keys of each.

Aux-il'iar-ly, adv.

adverb

By way of help. Harris.

Aux-il'ia-ry, n.

noun

(awg-zĭl'ya-rў), n. [Lat. auxiliarius.]

A helper; an assistant; a confederate in some action, enterprise, or undertaking; specifically, in the plural, foreign troops in the service of a nation at war.
(Gram.) A verb which helps to form the 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.
(Math.) A quantity introduced for the purpose of simplifying or facilitating some operation, as in equations or trigonometrical formulas. Math. Dict.

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