Also found in: Medical, Encyclopedia, Wikipedia.
n. (used with a sing. verb)
The study of organisms or environmental conditions that have been rendered free of bacteria or contaminants or into which a known microorganism or contaminant has been introduced for research purposes.
(Biology) (functioning as singular) the study of organisms living in germ-free conditions or when inoculated with known microorganisms
[C20: from Greek, from gnōtos, from gignōskein to know + bios known life]
a branch of biology that studies animals under germ-free conditions.See also: Biology