designating, of, or like the aerobic bacillus normally found in the colon: a coliform count is often used as an indicator of fecal contamination of water supplies
See coliform in American Heritage Dictionary 4
(kōˈlə-fôrmˌ, kŏlˈə-)
adjective
Of or relating to the bacilli that commonly inhabit the intestines of humans and other vertebrates, especially the colon bacillus.