Definition of astropyle in English:

astropyle

noun

Zoology
  • An orifice in the capsule of phaeodarian actinopods, consisting of a tubular projection or proboscis arising from a radiate operculum.

Origin

Late 19th century; earliest use found in Ernst Haeckel (1834–1919). From astro- (in allusion to the radiate operculum) + -pyle.

Pronunciation

astropyle

/ˈastrə(ʊ)pʌɪl/