Serpula
Pronunciation : Ser"pu*la, n.; pl. Serpul
Part of Speech : E.
Etymology : [L., a little snake. See Serpent.] (Zo?l.)
Definition : Defn: Any one of numerous species of tubicolous annelids of the genus Serpula and allied genera of the family Serpulid?. They secrete a calcareous tube, which is usually irregularly contorted, but is sometimes spirally coiled. The worm has a wreath of plumelike and often bright-colored gills around its head, and usually an operculum to close the aperture of its tube when it retracts.
Serpulas.
Source : Webster's Unabridged Dictionary, 1913