byssus byssolite • bystander · · · Info · Definitions · Synonyms · Characters · · byssus · · Text Latin · · Script 6 · · Length Definitions · · · (noun) tuft of strong filaments by which e.g. a mussel makes itself fast to a fixed surface. Synonyms: beard. · · Noun Definition 1 Synonyms · · · beard · · Synonym 1 Characters · · b latin small letter b U+0062 s latin small letter s U+0073 u latin small letter u U+0075 y latin small letter y U+0079