• (n.) One of the gigantic ostrichlike birds of the genus Aepiornis, only recently extinct. Its remains have been found in Madagascar.
Ep`i·or'nis noun [ New Latin : confer French épiornis . See Æpyornis .] (Zoology) One of the gigantic ostrichlike birds of the genus Æpiornis , only recently extinct. Its remains have been found in Madagascar. [ Written also Æpyornis .]