pennibrachium

Etymology
From +. Coined by Sullivan et al. in 2010.

Noun

 * 1)  A forelimb, found on various species of extinct and extant coelurosaur, that is not used in flight or gliding but still bears long, typically pennaceous feathers which form a winglike surface.

Usage notes
Although the term is usually reserved for the structures found on members of extinct lineages within the Maniraptora such as Oviraptorosauria and, certain extant bird species may be said to have pennibrachia as well, such as the flightless ostrich and the semi-flighted kagu.