| tubercle of rib | The knob on the posterior surface of a rib, at the junction of its neck and shaft, which articulates with the transverse process of the vertebra, whch corresponds in number to the rib, forming a costotransverse joint. Synonym: tuberculum costae. (05 Mar 2000) |
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| tubercle of saddle | The slight elevation in front of the pituitary fossa (sella turcica) on the body of the sphenoid bone. Synonym: tubercle of saddle. (05 Mar 2000) |
| tubercle of scaphoid bone | A projection at the inferior lateral angle of the scaphoid (navicular) bone; it can be felt at the root of the thumb. Synonym: tuberculum ossis scaphoidei. (05 Mar 2000) |
| tubercle of tooth | A small elevation on some portions of a crown produced by an extra formation of enamel. Synonym: tuberculum dentis, crown tubercle, tubercle of tooth, tuberculum coronae. (05 Mar 2000) |
| tubercle of trapezium | A prominent ridge on the trapezium forming the lateral border of the groove in which runs the tendon of the flexor carpi radialis. Synonym: tuberculum ossis trapezii, oblique ridge of trapezium. (05 Mar 2000) |
| tubercle of upper lip | The slight projection on the free edge of the centre of the upper lip at the lower extent of the philtrum. Synonym: tuberculum labii superioris, procheilon, prochilon, tubercle of upper lip. (05 Mar 2000) |
| jugular tubercle | An oval elevation on the cerebral surface of the lateral part of the occipital bone, on either side of the foramen magnum above the hypoglossal canal. Synonym: tuberculum jugulare. (05 Mar 2000) |
| fibrous tubercle | A tubercle in which fibroblasts proliferate about the periphery (and into the cellular zones), eventually resulting in a rim or wall of cellular fibrous tissue or collagenous material around the tubercle. (05 Mar 2000) |
| labial tubercle | The slight projection on the free edge of the centre of the upper lip at the lower extent of the philtrum. Synonym: tuberculum labii superioris, procheilon, prochilon, tubercle of upper lip. (05 Mar 2000) |
| lateral tubercle of posterior process of talus | The prominence lateral to the groove for the flexor hallucis longus tendon. Synonym: tuberculum laterale processus posterioris tali. (05 Mar 2000) |
| lesser tubercle of humerus | The anterior of the two tubercles of the neck of the humerus on which the subscapularis is inserted. Synonym: tuberculum minus humeri, lesser tuberosity of humerus. (05 Mar 2000) |
| Lisfranc's tubercle | A small spine on the inner edge of the first rib, giving attachment to the scalenus anterior muscle. Synonym: tuberculum musculi scaleni anterioris, Lisfranc's tubercle, scalene tubercle of Lisfranc, tubercle of anterior scalene muscle. (05 Mar 2000) |
| Lister's tubercle | dorsal tubercle of radius |
| Lower's tubercle | The slight projection on the wall of the right atrium between the orifices of the venae cavae. Synonym: tuberculum intervenosum, Lower's tubercle. (05 Mar 2000) |
| acid etching, dental | Pretreatment of tooth surfaces with etching agents, usually phosphoric acid, to increase the adhesion of various resin systems. (12 Dec 1998) |