Wiktionary
germfree
a. (context of an animal in gnotobiotics English) Having no microorganisms living in or on it.
WordNet
germfree
adj. free from germs or pathogenic organisms; sterile; "a germfree environment" [ant: germy]
Usage examples of "germfree".
Vampire Howard: sucking in transfusions to assure his germfree longevity.