- 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 spirilla
Historical Examples of spirilla
As early as 1873, spirilla were demonstrated in relapsing fever.The Evolution of Modern Medicine
The same takes place with the spirilla of recurrent typhus and the microbe of erysipelas.
When division occurs in one plane only, the possible groupings are the same as among the spirilla or bacilli.
These terms are rarely used, since spirilla do not ordinarily remain attached.
Division might occur in one plane only as in spirilla and bacilli, or in two planes only or in all three planes.
Word Origin 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.