| C3 | third cervical nerve; third cervical vertebra; third component of complement |
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| C4 | fourth cervical nerve; fourth cervical vertebra; fourth component of complement |
| C5 | fifth cervical nerve; fifth cervical vertebra; fifth component of complement |
| C6 | sixth cervical nerve; sixth cervical vertebra; sixth component of complement |
| C7 | seventh cervical nerve; seventh cervical vertebra; seventh component of complement |
| true ribs | Seven upper ribs on either side whose cartilages articulate directly with the sternum. Synonym: costae verae, vertebrosternal ribs. (05 Mar 2000) |
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| true thirst | Thirst that can be satisfied by drinking water. (05 Mar 2000) |
| true vocal cord | One of Ferrein's cords; the sharp edge of a fold of mucous membrane overlying the vocal ligament and stretching along either wall of the larynx from the angle between the laminae of the thyroid cartilage to the vocal process of the arytenoid cartilage; the vocal folds are the agents concerned in voice production. Synonym: plica vocalis, chorda vocalis, labium vocale, true vocal cord, vocal cord, vocal shelf. (05 Mar 2000) |
| basilar vertebra | The lowest lumbar vertebra. (05 Mar 2000) |
| block vertebra | <radiology> Congenital vertebral fusion, location: lumbar or cervical, height of the fused vertebral bodies equals the sum of heights of the involved bodies and intervertebral disc, waist at level of disc space see: cervical spine fusion (12 Dec 1998) |
| body of vertebra | The main portion of a vertebra anterior to the vertebral canal, as distinct from the arches. Synonym: corpus vertebrae. (05 Mar 2000) |
| butterfly vertebra | A hemivertebra or sagittally cleft vertebra that has a butterfly configuration on frontal radiographs; congenital in origin. (05 Mar 2000) |
| vertebra | <anatomy> One of 23 bones (excluding the sacrum) in the cervical, thoracic and lumbar regions that comprise the spine. There are 7 cervical vertebrae, 12 thoracic and 5 lumbar vertebrae. The bottom of the spine is fused and forms the sacrum. (27 Sep 1997) |
| vertebra dentata | <botany> A stem, commonly used for the main stem of a whole plant or of an inflorescence. (09 Oct 1997) |
| vertebra magna | <anatomy> The triangular-shaped bone lying between the 5th lumbar vertebra and the coccyx (tailbone). It consists of 5 vertebrae fused together and it articulates on each side with the bones of the pelvis (ilium), forming the sacroiliac joints. (17 Dec 1997) |
| vertebra plana | <radiology> Calve-Kummel-Verneuil disease, vertebral osteochondrosis, avascular necrosis of vertebral body, age: 2-15 years X-ray: uniform collapse of vertebral body into flat thin disc, increased density of verbra, neural arches not affected, disc spaces are normal with normal intervertebral disc space, intervertebral vacuum cleft sign (pathognomonic), no kyphosis mnemonic: FETISH, fracture, eosinophilic granuloma, tumour, infection, steroids, haemangioma (12 Dec 1998) |
| vertebra prominens | The vertebra in the cervicothoracic region which has the most prominent spinous process (seventh cervical vertebra in 70% of the cases, sixth in 20%, and first thoracic vertebra in 10%). Synonym: nuchal tubercle. (05 Mar 2000) |
| vertebra prominens reflex | Pressure upon the last cervical vertebra of an animal, especially of one whose labyrinths have been destroyed and the vestibular nuclei isolated, causes relaxation or reduced tone of all four limbs. (05 Mar 2000) |
| vertebra vera | Any one of the cervical, thoracic, or lumbar vertebrae. Synonym: vertebra vera. (05 Mar 2000) |
| pedicle of arch of vertebra | The constricted portion of the arch on either side extending from the body to the lamina; bound intervertebral foramina superiorly and inferiorly. Synonym: pediculus arcus vertebrae, radix arcus vertebrae. (05 Mar 2000) |