an•cil•lar•yPronunciation: (an'su-ler"ē or, esp. Brit., an-sil'u-rē), [key]
—adj., n., pl. -lar•ies.
something that serves in an ancillary capacity: Slides, records, and other ancillaries can be used with the basic textbook.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.