noun, plural spi·ril·la [spahy-ril-uh] /spaɪˈrɪl ə/. Bacteriology.
Origin of spirillum
Related formsspi·ril·lar, adjective
Examples from the Web for spirilla
From carious teeth may be isolated streptothrix, leptothrix, spirilla and fusiform bacilli.
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.
As early as 1873, spirilla were demonstrated in relapsing fever.The Evolution of Modern Medicine|William Osler
Spirilla are long, slender, thread-like cells, more or less spiral or wavy.Manual of Surgery|Alexis Thomson and Alexander Miles