英语释义
1
n. Any one of numerous species of tubicolous annelids of the
2
genus Serpula and allied genera of the family Serpulidae. They secrete
3
a calcareous tube, which is usually irregularly contorted, but is
4
sometimes spirally coiled. The worm has a wreath of plumelike and often
5
bright-colored gills around its head, and usually an operculum to close
6
the aperture of its tube when it retracts.