Zoology. a collection of silky filaments by which certain mollusks attach themselves to rocks.
an ancient cloth, thought to be of linen, cotton, or silk.
- bys·sa·ceous [bih-sey-shuhs], /bɪˈseɪ ʃəs/, byssoid, adjective
- byssal, adjective
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British Dictionary definitions for byssus
a mass of strong threads secreted by a sea mussel or similar mollusc that attaches the animal to a hard fixed surface
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012