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protegulum

noun pro·tegulum \ (ˈ)prō+ \
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Definition of protegulum

plural -s
: the embryonic shell of a brachiopod that is biconvex and smooth and has a wide posterior gape

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Origin and Etymology of protegulum

New Latin, from 1pro- + Latin tegulum covering, from tegere to cover + -ulum (neuter of -ulus -ule)

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