Aux*il"ia*ry [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.
© Webster 1913.
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; etre 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 formulae.
Math. Dict.
© Webster 1913.