Definition of flying lemur
: either of two nocturnal arboreal mammals (Cynocephalus volans of the Philippines and C. variegatus synonym Galeopterus variegatus of Vietnam and Thailand south to Indonesia) that are about the size of a cat, that make long gliding leaps using a broad fold of skin on each side attached to and extending between the limbs, and that are placed in a separate taxonomic order (Dermoptera) — called also
colugo
