planula

noun
plan·​u·​la | \ ˈplan-yə-lə How to pronounce planula (audio) \
plural planulae\ ˈplan-​yə-​ˌlē How to pronounce planulae (audio) , -​ˌlī \

Definition of planula

: the very young usually flattened oval or oblong free-swimming ciliated larva of a cnidarian

First Known Use of planula

1835, in the meaning defined above

History and Etymology for planula

New Latin, from Latin planus level, flat — more at floor

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The first known use of planula was in 1835

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Britannica.com: Encyclopedia article about planula

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