Definition of bacillus in English:

bacillus

Syllabification: ba·cil·lus
Pronunciation: /bəˈsiləs
 
/

noun (plural bacilli /-ˈsilī/)

1A disease-causing bacterium.
More example sentences
  • The isolation of the tuberculosis bacillus in 1882 by Robert Koch, who later became professor of hygiene and director of the Institute for Infectious Diseases in Berlin, was a scientific breakthrough.
  • When infectious people cough, sneeze, talk or spit, they propel TB germs, known as bacilli, into the air.
  • The man, who is unidentified as yet, does not have anthrax - the bacillus is on his person, but he's not infected, and with proper treatment, he should be fine.
1.1A rod-shaped bacterium.
More example sentences
  • One is a microscopic rod-shaped bacterium called bacillus anthracis, easy to grow in the lab but fragile and easily killed in the open.
  • At far right, Methanobacterium thermoautotrophicum, an elongate bacillus form.
  • The victim carried an enormous number of bacilli shaped with the typical ‘short rounded ends.’

Origin

late 19th century: from late Latin, diminutive of Latin baculus 'stick'.

Usage

All bacteria belonging to the genus Bacillus are called bacilli, but not all bacteria called bacilli belong to the genus Bacillus.

Derivatives

bacillary

Pronunciation: /ˈbasəˌlerē/
adjective
More example sentences
  • Shigellosis, also known as acute bacillary dysentery, is characterized by the passage of loose stools mixed with blood and mucus and accompanied by fever, abdominal cramps and tenesmus.
  • During 1967-70, bacillary dysentery was first reported in Central American countries.
  • Approximately a third of cases of dysentery were classified amoebic, a third as bacillary and the rest remained undifferentiated.

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Word of the day bimble
Pronunciation: ˈbɪmb(ə)l
verb
walk or travel at a leisurely pace