Definition of echiuroid
: any of a phylum (Echiura synonym Echiuroidea) of marine worms of uncertain taxonomic affinities that have a sensitive but nonretractile proboscis above the mouth
Indulge Your Inner Word Nerd
Origin and Etymology of echiuroid
New Latin Echiuroidea or Echiura, ultimately from Greek echis viper + oura tail
First Known Use: circa 1889
Seen and Heard
What made you want to look up echiuroid? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!