Definition of bacillus in English:

bacillus

Line breaks: ba¦cil|lus
Pronunciation: /bəˈsɪləs
 
/

noun (plural bacilli /-lʌɪ, -liː/)

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.’
1.1A disease-causing bacterium: the bacillus was thought to have proliferated in water polluted by sewage tubercle bacilli
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.

Origin

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

Usage

All bacteria belonging to the genus Bacillus are called bacilli. However, there are some bacteria, also called bacilli, which do not belong to the genus Bacillus.

Derivatives

bacillary

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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Pronunciation: ˌɪntəˈniːsʌɪn
adjective
destructive to both sides in a conflict