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stomium

noun sto·mi·um \ ˈstōmēəm \

Definition of stomium

plural stomia \-ēə\ also stomiums
1 : the thin-walled cells of the annulus marking the line or region of dehiscence of a fern sporangium
2 : the opening in an anther usually between lip cells through which dehiscence occurs

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Origin and Etymology of stomium

New Latin, from Greek stomion mouth

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