About The Word Proostracum

Bay Area Crosswords

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Proostracum

Proostracum Meaning & Definition
Proostracum Definition And Meaning

What's The Definition Of Proostracum?

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Proostracum In Webster's Dictionary

\Pro*["o]s"tra*cum\, n.; pl. {Pro["o]straca}. [NL., fr. Gr. ? before + ? shell of a testacean.] (Zo["o]l.) The anterior prolongation of the guard of the phragmocone of belemnites and allied fossil cephalopods, whether horny or calcareous. See Illust. of {Phragmocone}.

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