'Pygostyle' definitions:

Definition of 'Pygostyle'

From: GCIDE
  • Pygostyle \Py"go*style\, n. [Gr. pygh` the rump + ? a pillar.] (Anat.) 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[ae], and supports the uropigium. [1913 Webster]