gnotobiotic
adjective
gno·to·bi·ot·ic ˌnō-tō-bī-ˈä-tik 
-bē-
-bē- : of, relating to, living in, or being a controlled environment containing one or a few kinds of organisms
also : axenic
gnotobiotically
ˌnō-tō-bī-ˈä-ti-k(ə-)lē
adverb -bē-
Word History
Etymology
Greek gnōtos known (from gignōskein to know) + biotē life, way of life — more at know, biota
First Known Use
1949, in the meaning defined above
Medical Definition
gnotobiotic
adjective
gno·to·bi·ot·ic ˌnō-tə-(ˌ)bī-ˈät-ik -bē-
-bē- : of, relating to, living in, or being a controlled environment containing one or a few kinds of organisms
also : free from other living organisms : axenic
gnotobiotic mice