tuberculosity

[Eng. tuberculos (e); -ity.] The quality or state of being tuberculose; a swell. ing, a knob. tu-ber-cu-lŭm, s. [Lat.] 1. Science : A tubercle (q. v.). Used in anatomy, b ., as tuberculum sellæ the Olivary proce . 3. Pathol.: A growth, usually taking the shape of minute rounded ma es (whence the name tubercle; see etymology), which is apt to spring up in the lungs, intestines, mesenteric glands, larynx, ., of persons of scrofulous constitution. It is found in two forms: gray (miliary or true) and yellow tubercle. The former consists of gray granulations about the size of a millet seed. It contains lymphoid, epitheloid, and giant cells, with free nuclei and intercellular substance. The giant cell occupies the center, and is found also in other products than tubercle. The yellow is found in larger ma es than the gray tubercle; it is softer and more friable, and presents an opaque yellow appearance. It is developed by o eous degeneration from true tubercle. Koch attributes the production of tubercle to a bacillus which he has discovered and described. [PHTHISIS.] "Evidence for the prosecution went to show that the lungs of the cow were affected with tubercle in an advanced stage."- Field , Dec. 19, 1885. (1) Gray Tubercle of Rolando : Anat.: A ma of gray matter approaching the surface of the medulla oblong at a behind the restiform body of the brain. (2) Tubercle of Lower : Anat .: A slight projection, better marked in the quadrupeds than in man, between the two orifices of the right auricle of the heart. Quain considers the name somewhat misleading. 2. Bot .: A convex shield without an elevated rim, found in some lichens, as Verruca ria. Called also Cephalodium. tü-ber-if-er-oŭs, adj . [Lat. tuber =a tuber; i connect., and fero =to bear.) Bearing or producing tubers.