| pygopodous | <zoology> Of or pertaining to the Pygopodes. Source: Websters Dictionary (01 Mar 1998) |
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| pygostyle | <anatomy> 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 vertebrae, and supports the uropigium. Origin: Gr. The rump + a pillar. Source: Websters Dictionary (01 Mar 1998) |
| pygotartaric | <chemistry> Pertaining to, or designating, an acid obtained as a white crystalline substance by the distillation of tartaric acid. Origin: Pyro- + tartaric. Source: Websters Dictionary (01 Mar 1998) |
| pygropodes | <ornithology> A division of swimming birds which includes the grebes, divers, auks, etc, in which the legs are placed far back. Source: Websters Dictionary (01 Mar 1998) |