Koch's bacillus

Koch's bacillus
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.

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  • Koch's bacillus — kōks , käch əz or Koch bacillus kōk , käch n a bacillus of the genus Mycobacterium (M. tuberculosis) that causes human tuberculosis Koch kȯk (Heinrich Hermann) Robert (1843 1910) German bacteriologist. Koch is usually hailed as the founder of… …   Medical dictionary

  • Koch-Weeks bacillus — wēks n a bacterium of the genus Haemophilus (H. aegyptius) associated with an infectious form of human conjunctivitis compare PFEIFFER S BACILLUS Weeks John Elmer (1853 1949) American ophthalmologist. Weeks founded a clinical laboratory for… …   Medical dictionary

  • Koch's bacillus — /kɒks bəˈsɪləs/ (say koks buh siluhs) noun a bacillus, Mycobacterium tuberculosis, that causes tuberculosis. Also, Koch bacillus. {named after Robert Koch} …  

  • koch's bacillus — noun or koch bacillus Usage: usually capitalized K : a bacillus (Mycobacterium tuberculosis) that causes human tuberculosis …   Useful english dictionary

  • Koch's bacillus — see Mycobacterium [R. Koch (1843–1910), German bacteriologist] …   The new mediacal dictionary

  • koch-weeks bacillus — ˈwēks noun Usage: usually capitalized K&W Etymology: after Robert Koch died 1910 and John E. Weeks died 1949 American ophthalmologist, who discovered it independently : a bacterium of the genus Hemophilus associated with human conjunctivitis …   Useful english dictionary

  • Koch–Weeks bacillus — …   Useful english dictionary

  • Koch-Weeks conjunctivitis — n conjunctivitis caused by the Koch Weeks bacillus * * * acute contagious c …   Medical dictionary

  • Bacillus tuberculosis — 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 Collaborative International Dictionary of English

  • koch bacillus — noun see koch s bacillus …   Useful english dictionary

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