Definition of echiurid in US English:

echiurid

adjective

Zoology
  • Of or relating to the phylum Echiura, or to the family Echiuridae.

noun

Zoology
  • An animal of the phylum Echiura, or of the family Echiuridae.

Origin

Late 19th century; earliest use found in American Naturalist. From scientific Latin Echiurus + -id, after either French échiurides, or scientific Latin Echiuridae, family name, and, in later use, Echiurida, group name.

Pronunciation

echiurid

/ɛkɪˈ(j)ʊərɪd/