tubercle


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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
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. 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.

tubercle

[′tü·bər·kəl]
(biology)
A small knoblike prominence.
(metallurgy)
A mound of corrosive products on the surface of a metal that is subjected to local corrosive attack.

tubercle

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
References in periodicals archive ?
Because the tubercle bacillus can involve every organ system, its clinical manifestations represent slight variations depends upon the site of involvement.
Fluid or air may collect between the lungs and the lining of the lungs, while tubercles continue to develop in the lung, progressively destroying lung tissue.
For this analysis, we used various reference points; frontozygomatic suture, superior aspect of the superior orbital fissure, Whitnall's tubercle, superior aspect of the optic canal, and superior aspect of the supraorbital notch to the metoptic canal were measured at 29.51 [+ or -] 11.20, 15.80 [+ or -] 4.26, 22.85 [+ or -] 9.95, 8.90 [+ or -] 2.74, and 40.62 [+ or -] 8.87 mm in the right side, respectively, and 27.98 [+ or -] 5.67, 15.98 [+ or -] 3.42, 21.66 [+ or -] 4.77, 9.21 [+ or -] 2.42, and 42.24 [+ or -] 12.77 mm in the left side, respectively We statistically analyzed these measurements according to the sides.
Based on Roewer's formulae, he placed the species in this genus as he considered the pair of paramedian tubercles of area I to be conspicuous.
Table 1 shows the mean values of the horizontal and vertical diameters of the outer and inner openings of the TF and the distance between the superior tubercle and the TF.
designated the connecting line between pubic tubercle and medial femoral epicondyle as the longitudinal reference line, the connecting line from pubic tubercle to greater trochanter of femur as the horizontal reference line.
The size and number of tubercles also differed among the three locations (Table 1), which suggested intraspecific differences.
The second non-responsive tooth (also left a mandibular second premolar) received revascularization treatment due to the presence of a fistula 1 year prior to this study, as a result of pulp necrosis arising from the fracture of the tubercle. Three months later, apical surgery was performed due to the recurrence of the fistula.
Gender determination is then made by scanning of the caudal fetal abdomen, hindquarters, and buttocks to identify the position of the genital tubercle or the anatomical structure of the primary sex organs.
The traumatic forces may cause either attrition or fracture of the tubercle, thus resulting in inevitable pulp exposure [2].
MPTC can be classified into three types according to the locations: (1) MPTC in unilateral thyroid: preoperative diagnosis finds no tubercle in opposite thyroid; (2) MPTC in unilateral thyroid: preoperative diagnosis finds tubercles in opposite thyroid but considers them as benign tubercles; (3) MPTC are distributed in bilateral thyroid.