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tubercle

tubercle (tōō´bərkyōōl´) [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 tuberculosis. 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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tubercle

tu·ber·cle / ˈt(y)oōbərkəl/ • n. 1. Anat. , Zool. , & Bot. a small rounded projection or protuberance, esp. on a bone or on the surface of an animal or plant. 2. Med. a small nodular lesion in the lungs or other tissues, characteristic of tuberculosis. DERIVATIVES: tu·ber·cu·late / t(y)oōˈbərkyəˌlāt; -lit/ adj. (in sense 1).

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tubercle

tubercle The domed, surface structure in trilobites (Trilobita). Some tubercles appear to be domes covering a space, others may have been the sites of sensory organs.

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tubercle

tubercle (tew-ber-kŭl) n.
1. (in anatomy) a small rounded protuberance on a bone.

2. the specific nodular lesion of tuberculosis.

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tubercle

tubercle A dome-like projection.

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