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hysterothecium

noun
hys·​ter·​o·​the·​ci·​um | \ˌhistərōˈthēs(h)ēəm\

Definition of hysterothecium 

: a narrow elongated ascocarp opening at maturity by a narrow lengthwise slit

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History and Etymology for hysterothecium

New Latin, from hyster- + -thecium

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