Pygostyle
Pronunciation : Py"go*style
Part of Speech : n.
Etymology : [Gr. (Anat.)
Definition : Defn: The plate of bone which forms the posterior end of the vertebral column in most birds; the plowshare bone; the vomer. It is formed by the union of a number of the last caudal vertebr?, and supports the uropigium.
Source : Webster's Unabridged Dictionary, 1913