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protegulum

noun
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pro·​tegulum | \ (ˈ)prō+ \
plural -s

Definition of protegulum

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

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History and Etymology for protegulum

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

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“Protegulum.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/protegulum. Accessed 25 January 2020.

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