Definition of vaginula
1 : the part of the archegonium of a moss enveloping the base of the embryo or seta after the upper part has been torn away
2 : a small theca
vaginulate\-ˌlāt, -ə̇t\ adjective
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Origin and Etymology of vaginula
borrowed from New Latin, from Latin vāgīna “sheath, scabbard” + -ula, diminutive suffix — more at vagina
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