RhymeZone: radiole definitions

Definitions of radiole:

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

(Definitions from Wiktionary)