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echiurid

[ek-ee-yoo r-id]
noun
  1. any of various unsegmented marine worms of the phylum Echiura, comprising the spoonworms.

Origin of echiurid

< New Latin Echiurida, variant of Echiura < Greek échi(s) viper + -oura neuter plural of -ouros -tailed (derivative of ourá tail); Cf. Echiurus a genus of the phylum; see -ida
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018