tubercle(redirected from tubercle of the upper lip)
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tubercle(to͞o`bərkyo͞ol') [Lat.,=little swelling], small, usually solid, nodule or prominence. In anatomy the term is applied to natural prominences in certain muscles, to nerve nuclei of the central nervous system, and to eminences on bones, especially in regions where muscles (through tendons) or bones (through ligaments) are attached. In dentistry tubercle refers to the cusp of a tooth. In pathology it describes small morbid growths, particularly the lesions of tuberculosistuberculosis
(TB), contagious, wasting disease caused by any of several mycobacteria. The most common form of the disease is tuberculosis of the lungs (pulmonary consumption, or phthisis), but the intestines, bones and joints, the skin, and the genitourinary, lymphatic, and
..... Click the link for more information. . In botany it applies to the nodules on the roots or leaves of plants. In entomology the term is used for a compound or supplementary eye and for the nodules on the bodies of certain insects.
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A small knoblike prominence.
A mound of corrosive products on the surface of a metal that is subjected to local corrosive attack.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
1. any small rounded nodule or elevation, esp on the skin, on a bone, or on a plant
2. any small rounded pathological lesion of the tissues, esp one characteristic of tuberculosis
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005