germfree

adjectives

free from germs or pathogenic organisms; sterile
"a germfree environment"
antonym
is similar to
(of experimental animals) raised under sterile conditions
"axenic conditions"; "germfree animals"
see also
thoroughly clean and free of or destructive to disease-causing organisms
"doctors in antiseptic green coats"; "the antiseptic effect of alcohol"; "it is said that marjoram has antiseptic qualities"