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serpulid

British  
/ ˈsɜːpjʊlɪd /

noun

  1. a marine polychaete worm of the family Serpulidae, which constructs and lives in a calcareous tube attached to stones or seaweed and has a crown of ciliated tentacles

"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

Etymology

Origin of serpulid

C19: Latin, from serpula a little serpent