ōˈnijənə noun
Usage: capitalized
Etymology: New Latin, irregular from Greek onyx nail of the finger or toe, claw, hoof + New Latin -gena (from Greek -genēs born) — more at -gen
: a genus (the type of the family Onygenaceae) of ascomycetous fungi that have stalked capitate ascocarps and occur typically on decaying animal materials (as hooves or feathers)