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byssus

noun pl. byssuses or byssi

  1. a fine fabric, esp. a linen cloth, used by the ancients, as in Egypt for mummy wrapping
  2. Zool. a tuft of filaments, chemically similar to silk, secreted by various marine bivalves, esp. the mussels, and used to attach the mollusk to the substratum

See byssus in American Heritage Dictionary 4

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