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Vertebrae :: Vertebrae (pl. ) of Vertebr.

Pygostyle :: Pygostyle (n.) 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..

Protovertebral :: Protovertebral (a.) Of or pertaining to the protovertebrae.

Opisthocoelous :: Opisthocoelous (a.) Concave behind; -- applied especially to vertebrae in which the anterior end of the centrum is convex and the posterior concave.

Urosacral :: Urosacral (a.) Of or pertaining to both the caudal and sacral parts of the vertebral column; as, the urosacral vertebrae of birds..

Plectospondyli :: Plectospondyli (n. pl.) An extensive suborder of fresh-water physostomous fishes having the anterior vertebrae united and much modified; the Eventognathi.

Amphicoelous :: Amphicoelous (a.) Having both ends concave; biconcave; -- said of vertebrae.

Biconcave :: Biconcave (a.) Concave on both sides; as, biconcave vertebrae..

Intercentrum :: Intercentrum (n.) The median of the three elements composing the centra of the vertebrae in some fossil batrachians.

Procoelian :: Procoelian (n.) A reptile having procoelian vertebrae; one of the Procoelia.

Pott''s Disease :: Pott's disease () Caries of the vertebrae, frequently resulting in curvature of the spine and paralysis of the lower extremities; -- so named from Percival Pott, an English surgeon..

Perivertebral :: Perivertebral (a.) Surrounding the vertebrae.

Notochord :: Notochord (n.) An elastic cartilagelike rod which is developed beneath the medullary groove in the vertebrate embryo, and constitutes the primitive axial skeleton around which the centra of the vertebrae and the posterior part of the base of the skull are developed; the chorda dorsalis. See Illust. of Ectoderm..

Vertebrarterial :: Vertebrarterial (a.) Of or pertaining to a vertebrae and an artery; -- said of the foramina in the transverse processes of cervical vertebrae and of the canal which they form for the vertebral artery and vein.

Vertebro- :: Vertebro- () A combining form used in anatomy to indicate connection with, or relation to, a vertebra, vertebrae, or vertebral column; as in vertebrocostal..

Procoelian :: Procoelian (a.) Concave in front; as, procoelian vertebrae, which have the anterior end of the centra concave and the posterior convex..

Psoas :: Psoas (n.) An internal muscle arising from the lumbar vertebrae and inserted into the femur. In man there are usually two on each side, and the larger one, or great psoas, forms a part of the iliopsoas..

Amphioxus :: Amphioxus (n.) A fishlike creature (Amphioxus lanceolatus), two or three inches long, found in temperature seas; -- also called the lancelet. Its body is pointed at both ends. It is the lowest and most generalized of the vertebrates, having neither brain, skull, vertebrae, nor red blood. It forms the type of the group Acrania, Leptocardia, etc..

Zygosphene :: Zygosphene (n.) A median process on the front part of the neural arch of the vertebrae of most snakes and some lizards, which fits into a fossa, called the zygantrum, on the back part of the arch in front..

Ichthyosaurus :: Ichthyosaurus (n.) An extinct genus of marine reptiles; -- so named from their short, biconcave vertebrae, resembling those of fishes. Several species, varying in length from ten to thirty feet, are known from the Liassic, Oolitic, and Cretaceous formations..

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