Aux•oPronunciation: (ôk'sō), [key]
—n. Class. Myth.
one of the Graces worshiped at Athens.
a combining form meaning “growth,” “increase,” used in the formation of compound words: auxochrome. Also, esp. before a vowel,aux-.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.