Pleurotomaria
noun
Pleu·ro·to·mar·ia
ˌplu̇rətəˈma(a)rēə
: a large genus of nearly extinct two-gilled gastropods (suborder Rhipidoglossa) usually having a trochiform nacreous shell with a broad sinus in the outer margin of the last whorl that extends back around the whorls as a raised band
pleurotomariid
adjective or noun
¦⸗⸗⸗¦ma(a)rēə̇d
pleurotomarioid
adjective or noun
-ēˌȯid
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Merriam-Webster unabridged
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