SINCE 1828
planula
noun
plan·u·la
| \ ˈplan-yə-lə
\
\
plural planulae\ ˈplan-yə-ˌlē
, -ˌlī \
, -ˌlī \
Definition of planula
: the very young usually flattened oval or oblong free-swimming ciliated larva of a cnidarian
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Merriam-Webster unabridged
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