Dictionary
col'iform bacil'lus
Bacteriol.
any of several bacilli, esp.
Escherichia coli and members of the genus
Aerobacter, found as commensals in the large intestine of humans and certain other animals, the presence of which in water indicates fecal pollution. Also called
col'iform bacte'rium, colon bacillus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.