syn·an·gi·um | \ -jēəm \
plural synangia\ -j(ē)ə \
Definition of synangium
1 : the peripheral part of an arterial trunk from which the branches arise in a lower vertebrate — compare pylangium
2 : a sorus (as in ferns of the family Marattiaceae) made up of sporangia variously united or cohered into a compound structure
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