Definition of actinula in English:

actinula

noun

Zoology
  • In some hydrozoans: a mobile tentaculate larva, which develops from a planula and transforms into an adult polyp or medusa after dispersal.

Origin

Late 19th century; earliest use found in George Allman (1812–1898), naturalist. From ancient Greek ἀκτῖν-, ἀκτίς ray + -ula, after planula.

Pronunciation:

actinula

/akˈtɪnjʊlə/