- any of several spirally twisted, aerobic bacteria of the genus Spirillum, certain species of which are pathogenic for humans.
- any of various similar microorganisms.
Origin of spirillum
Examples from the Web for spirillum
Historical Examples of spirillum
The spirillum is a very slender, wavy thread, about 30 to 40 long.
In shape bacteria show three different types; the rod-shaped (bacillus), the spherical (coccus), and the spiral (spirillum).
Vibrio spirillum is excessively minute, colourless, and found in decomposing vegetable mixtures.An Elementary Text-book of the Microscope
John William Griffith
The spirillum of relapsing fever can be identified by the method for the malarial parasite in fresh blood.
Spirillum, spī-ril′um, n. a genus of bacteria with cylindrical spirally twisted cells:—pl.
Word Origin for spirillum
Word Origin and History for spirillum
(plural spirilla), 1875, Modern Latin, diminutive of Latin spira (see spiral (adj.)). So called for their structure.
- A member of the genus Spirillum.
- Any of various other spiral-shaped microorganisms.
- A genus of large, aerobic, gram-negative bacteria having an elongated spiral form and a tuft of flagella.
- Any of various bacteria that are shaped like a spiral, such as the spirochete Treponema pallidum, which causes syphilis.