Pronunciation: (bis'us), [key]
—pl. bys•sus•es, bys•siPronunciation: (bis'ī). [key]
1. Zool.a collection of silky filaments by which certain mollusks attach themselves to rocks.
2. an ancient cloth, thought to be of linen, cotton, or silk.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.