epistome

noun
ep·​i·​stome | \ ˈe-pə-ˌstōm How to pronounce epistome (audio) \

Definition of epistome

: any of several structures or regions situated above or covering the mouth of various invertebrates

First Known Use of epistome

1852, in the meaning defined above

History and Etymology for epistome

New Latin epistoma

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The first known use of epistome was in 1852

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