Tubercle Tu"ber*cle, n. [L. tuberculum, dim. of tuber: cf. F. tubercule, OF. also tubercle. See {Tuber}.] [1913 Webster] 1. A small knoblike prominence or excrescence, whether natural or morbid; as, a tubercle on a plant; a tubercle on a bone; the tubercles appearing on the body in leprosy. [1913 Webster]

2. (Med.) A small mass or aggregation of morbid matter; especially, the deposit which accompanies scrofula or phthisis. This is composed of a hard, grayish, or yellowish, translucent or opaque matter, which gradually softens, and excites suppuration in its vicinity. It is most frequently found in the lungs, causing consumption. [1913 Webster]

{Tubercle bacillus} (Med.), a minute vegetable organism ({Mycobacterium tuberculosis}, formerly {Bacillus tuberculosis}, and also called {Koch's bacillus}) discovered by Koch, a German physician, in the sputum of consumptive patients and in tuberculous tissue. It is the causative agent of tuberculosis. [1913 Webster +PJC]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • tubercle — (n.) 1570s, from L. tuberculum a small swelling, dim. of tuber lump (see TUBER (Cf. tuber)) …   Etymology dictionary

  • tubercle — ► NOUN 1) a small rounded projection or protuberance on a bone or on the surface of an animal or plant. 2) a small rounded swelling in the lungs or other tissues, characteristic of tuberculosis. ORIGIN Latin tuberculum small lump or swelling …   English terms dictionary

  • tubercle — [to͞o′bər kəl, tyo͞o′bər kəl] n. [L tuberculum, dim. of tuber: see TUBER] any small, rounded projection or process; specif., a) Bot. any of the wartlike growths on the roots of some plants b) Anat. a knoblike elevation, as on a bone c) Med. any… …   English World dictionary

  • Tubercle — A small tuber, a small lump or bump. * * * 1. A nodule, especially in an anatomic, not pathologic, sense. 2. A circumscribed, rounded, solid elevation on the skin, mucous membrane, or surface of an organ. 3. A slight …   Medical dictionary

  • Tubercle — A tubercle is generally a wart like projection, but it has slightly different meaning depending on which family of plants or animals it is used to refer to. In the case of certain orchids and cacti, it denotes a round nodule, small eminence, or… …   Wikipedia

  • tubercle — A small round firm swelling or nodule on the surface of carapace or limbs [Ingle, 1983]. Knoblike process; tip usually blunt [Butler, T.H.]. Low protuberance on exoskeleton [Hobbs and Jass, 1988]. (Class Ostracoda): Type of valve sculpture:… …   Crustacea glossary

  • tubercle — n. 1 a small rounded protuberance esp. on a bone. 2 a small rounded swelling on the body or in an organ, esp. a nodular lesion characteristic of tuberculosis in the lungs etc. 3 a small tuber; a wartlike growth. Phrases and idioms: tubercle… …   Useful english dictionary

  • tubercle — noun Etymology: Latin tuberculum, diminutive of tuber Date: 1578 1. a small knobby prominence or excrescence especially on a plant or animal ; nodule: as a. a protuberance near the head of a rib that articulates with the transverse process of a… …   New Collegiate Dictionary

  • tubercle — a small, usually hard protuberance or excrescence of the skin …   Dictionary of ichthyology

  • tubercle — n. [L. dim. tuber, hump] 1. A small knoblike or rounded protuberance; see torus. 2. (ARTHROPODA: Insecta) In Diptera, sometimes used for an elongate facial swelling …   Dictionary of invertebrate zoology

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