perigynium
/ˌpɛrɪˈdʒɪnɪəm/Botany
noun
A structure surrounding the ovary or archegonium of a plant; specifically an inflated membranous sac (utricle) surrounding the ovary in sedges.
Origin
Early 19th century; earliest use found in Samuel Frederick Gray (1766–1828), naturalist and pharmacologist. From scientific Latin perigynium from peri- + ancient Greek γυνή + scientific Latin -ium.
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