prostomium

noun
pro·​sto·​mi·​um | \ prō-ˈstō-mē-əm How to pronounce prostomium (audio) \
plural prostomia\ prō-​ˈstō-​mē-​ə How to pronounce prostomium (audio) \

Definition of prostomium

: the portion of the head of an annelid worm (such as an earthworm) that is situated in front of the mouth

Other Words from prostomium

prostomial \ prō-​ˈstō-​mē-​əl How to pronounce prostomium (audio) \ adjective

First Known Use of prostomium

1870, in the meaning defined above

History and Etymology for prostomium

New Latin, from Greek pro- + stoma mouth — more at stomach entry 1

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The first known use of prostomium was in 1870

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Dictionary Entries Near prostomium

prostomiate

prostomium

prostrate

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Cite this Entry

“Prostomium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/prostomium. Accessed 27 Jul. 2021.

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More from Merriam-Webster on prostomium

Britannica.com: Encyclopedia article about prostomium

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