pel viper it on it is (pelviper"it on it is)

[NL., pelvis (pelvis), n.; pl. pelves (-vēz). [NL., πέλλα, a bowl: see pelike.] 1. A bony basin L. pelvis, a basin, laver; cf. Gr. πέλυξ, πελλίς, forming the most inferior or posterior one of the three great cavities thoracic, abdominal, and pelvic of the trunk of most terrestrial vertebrates. A perfect pelvis is formed on each side by the haunch-bones, consisting of ilium, ischium, and pubis, meeting in front at the pubic symphysis, and completed behind by the sacrum, with which the iliac bones articulate, and by more or fewer coccygeal or caudal vertebræ. But the pubic symphysis is wanting, as a rule, in animals below mammals; there is sometimes an ischiac and often an iliac symphysis. In any case, a recognizable ilium or ischium or pubis, however rudimentary, constitutes in so far a pelvis. The human pelvis is complete, and 2 7 6 3 Human Pelvis, from the front. 4 8 1 1, crest of ilium; 2, base (uppermost) of sacrum; 3, symphysis pubis; 4, acetabulum or socket of thigh-bone; 5, iliac fo a, a part of the false pelvis; ischium; obturator foramen; iliopectineal of true pelvis. (Coccyx, not shown, directly behind pubic symphysis.) of normal composition, but remarkable for its shortne , width, axial curvature, and obliquity with reference to the long axis of the body. A perpendicular to the plane of the inlet would leave the abdomen at the umbilicus, and a per pendicular to the plane of the outlet would strike the promontory of the sacrum. The pelvis is divided into true and false the latter being that part which is above the iliopectineal line, the former below the same line, which thus represents, in part, the brim or superior strait of the true pelvis. The false pelvis is broad and shallow, composed, as far as bone is concerned, chiefly by the flaring iliac fo æ, its front wall being made by the lower part of the abdominal parietes; and in the erect attitude the ma of abdominal viscera rests largely upon this part of the basin. The true pelvis is more contracted, and chiefly bony as to its walls. Its inlet or superior plane, cordiform in shape, is circumscribed by the pelvic brim, which is formed by the iliopectineal crest, completed in front by the spine and crest the pubes, and behind by the curved ridge and promontory of the sacrum. The lower plane, or outlet, known also as the inferior strait, is bounded by a vis. Roberts's pelvis, a transversely contracted pelvis, resulting from ankylosis of the sacro-iliac articulations. - True pelvis, that part of the pelvic wall and contained space which is below (in man) or behind the pelvic brim; the pelvis between the inlet and the outlet: chiefly an obstetrical phrase. pelvisacral (pel-vi-sa'kral), a. [ vistern - um + -al.] Having the character of a pelvisternum. pelvisternum (pel-vi-ster'num), n.; pl. pelvi sterna (-nä). [NL., sternum. [NL., pelycometer (pel-i-kom'e-ter), n. [ μέτρον , measure.] A pelvimeter. Pelycosaur i a (pel i-kō-sa'ri-ä), n . pl . Gr. πέλυξ (πελυκ-), a basin, + σαῦρος , lizard.] A division of reptiles, containing those Thero- morph a or The rom or a which have the coracoid reduced, ribs two-headed, two or three sacral vertebræ, the centra generally notochordal, and inter centra usually present. They lived during the Carboniferous or Per moc arb on i fer- ous epoch. pelycosaur i an (pel i-kō-sa'ri-an), a . and n. I. a . Pertaining to the Pelycosaur i a , or having their characters. II. n. One of the Pelycosaur i a .