[mass noun](historical)a fine textile fibre and fabric of flax (史)黄麻纤维;黄麻织物
[count noun](Zoology)a tuft of tough silky filaments by which mussels and some other bivalves adhere to rocks and other objects (动)足丝;丝足 [as modifier]byssus threads. 足丝线。
派生 byssal adjective 语源
late Middle English : from Latin, from Greek bussos, of Semitic origin