Poplite´al, a. Pertaining to the back of the knee.
Por´tal Circula´tion. Passage of blood from the capillaries of one organ to those of another, as is conspicuous in certain of the digestive viscera.
Postax´ial, a. Situate on the external or posterior (ulnar or fibular) side of a limb.
Poste´rior Portion. (8.) See Uræum.
Posterior Toe. (125.) The hind-toe, or that one directed backward, is generally the hallux; often also the fourth or outer; rarely the second or inner. The hallux is generally meant by posterior toe.
Postor´bital, a. Situate behind the eye.
Pow´der-down Feath´ers, n. pl. Peculiar imperfect feathers, in a matted patch, which grow continually, and as constantly break down, with a scurfy exfoliation, and pervaded with a greasy substance; they are especially conspicuous in the heron tribe, but are also found elsewhere.
Præax´ial, a. Situate on the internal or anterior (radial or tibial) side of a limb.
Præco´ces, n. pl. An obsolete group of birds, able to run about and feed themselves at birth.
Præco´cial, n. Belonging to the Præcoces; having the nature of Præcoces.