aphanisia

noun
aph·​a·​ni·​sia | \ ˌafəˈnizh(ē)ə, -nēzh-\
plural -s

Definition of aphanisia

: early normal development of a vestigial organ followed by regression — compare rudimentation

History and Etymology for aphanisia

New Latin, from Greek aphanisis disappearance + New Latin -ia

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