Tubercle definition

to͝obər-kəl, tyo͝o-
tubercles
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Frequency:
A small rounded projecting part or outgrowth, such as a wartlike excrescence on the roots of some leguminous plants or a knoblike process in the skin or on a bone.
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(medicine) A nodule or swelling, especially a mass of lymphocytes and epithelioid cells forming the characteristic lesion of tuberculosis.
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Any small, rounded projection or process.
  • (bot.) Any of the wartlike growths on the roots of some plants.
  • (anat.) A knoblike elevation, as on a bone.
  • (med.) Any abnormal hard nodule or swelling; specif., the typical nodular lesion of tuberculosis.
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An anatomical nodule.
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A small elevation on the surface of a tooth.
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A nodule or swelling, especially a mass of lymphocytes and epithelioid cells forming the characteristic granulomatous lesion of tuberculosis.
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A small rounded projection, swelling, or lump, as on the roots of legumes or on bodily tissue, especially the cluster of inflammatory cells that form in the lungs in tuberculosis.
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(anatomy) A round nodule, small eminence, or warty outgrowth, especially those found on bones for the attachment of a muscle or ligament or small elevations on the surface of a tooth.
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(botany) A small rounded wartlike protuberance of the roots of some leguminous plants; the lip of certain orchids, cacti.
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(pathology) A small rounded nodule forming the characteristic lesion of tuberculosis.
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Other Word Forms

Noun

Singular:
tubercle
Plural:
tubercles

Origin of tubercle

  • Latin tūberculum diminutive of tūber lump tuber

    From American Heritage Dictionary of the English Language, 5th Edition

Tubercle Sentence Examples

  • Hind feet with one or two phalanges, in the first toe forming a distinct tubercle visible externally; the second and third toes very slender, of equal length, joined as far From Gould.

  • After making its way into the interior, the intruder sets up a considerable hyper trophy of the tissue, causing the formation of a tubercle, which soon shows a certain differentiation, branches of the vascular bundles of the root being supplied to it.

  • The chief muscular mass, arising from the sternum in the shape of a U, is the pectoralis muscle; its fibres converge into a strong tendon, which is inserted upon the greater tubercle and upper crest of the humerus, which it depresses and slightly rotates forwards during the downstroke.

  • This arises mostly from the angle formed by the keel with the body of the sternum, passes by a strong tendon through the foramen triosseum, and is inserted upon the upper tubercle of the humeral crest, which it rotates and abducts.

  • Before the discovery of the bacillus of tubercle, scrofula and tuberculosis were regarded as two distinct diseases, and it was supposed that the scrofulous constitution could be distinguished from the tubercular.

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