English Explanatory Dictionary

radiole

English dictionary entry

Meanings

noun
  1. The spine of a sea urchin.
  2. A heavily ciliated feather-like tentacle occurring in clusters on the crowns of certain tubeworms, especially those of the order Canalipalpata (fan-head worms), used for feeding and respiration.

Pronunciation

/ˈɹeɪdɪəʊl/ En-uk-radiole.oga

Word forms

radiole radioles

Etymology

From Late Latin radiolus (“a fossil echinoid’s spine”), from Latin radius (“rod, staff”) (possibly ultimately from Proto-Indo-European *reh₁t- (“beam, pole, post”)) + -olus (diminutive suffix) (ultimately from Proto-Indo-European *-lós). The word first appears in the works of Scottish natural historian and marine zoologist Charles Wyville Thomson (1830–1882).

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