Pronunciation: (an"u-krOO'sis), [key]
—pl. -cru•sesPronunciation: (-krOO'sēz). [key]
1. Pros.an unstressed syllable or syllable group that begins a line of verse but is not counted as part of the first foot.
2. Music.the note or notes preceding a downbeat; upbeat.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.