pennibrachia

Noun

pennibrachium (plural pennibrachia)

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.
   • Some dromaeosaurid, troodontid, oviraptorosaur and therizinosaur specimens show the presence of what we term a ‘pennibrachium’, a forelimb bearing long feathers that form a planar, wing-like surface but are not necessarily used in aerial locomotion.2010 July 7, Corwin Sullivan, “The asymmetry of the carpal joint and the evolution of wing folding in maniraptoran theropod dinosaurs”, in Proceedings of the Royal Society B: Biological Sciences...