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perigonium
noun
peri·go·ni·um
\ˌperəˈgōnēəm\
Definition of perigonium
perigonia
\-ēə\1 : a perianth especially of a liverwort — compare perichaetium
2 : a sac surrounding the generative bodies in the gonophore of a hydroid
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Origin and Etymology of perigonium
New Latin, from peri- + gon- + -ium
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