The Collaborative International Dictionary
Auxiliary scales
Auxiliary \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.