actinula
noun
ac·tin·u·la
| \ ak-ˈtin-yə-lə\
plural actinulas
or actinulae\ ak-ˈtin-yə-ˌlē \
Definition of actinula
: a creeping larva of the hydroid generation of certain coelenterates (as Tubularia) that finally attaches and develops into a polyp
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