Luna had been, from the very first, a germ-free environment.

Gideon is reported to be a virtual paradise where the people live incredibly long lives in a nearly germ-free environment.

Other companies raise laboratory mice in germ-free environments but not on such restricted diets.

To the Editor: The idea of a germ-free environment brings to mind my time as a first-time mom in 1978.

As a young researcher, in an era before antibiotics, he developed germ-free environments in which to grow mosquito larvae.

He plans to take over the mafia's casinos in Las Vegas to establish a "germ-free environment" for his residence.

The only possible purpose it could serve would have been as a biological laboratory for experiments involving things growing in a germ-free environment.

Interestingly, the incidence of disease is much higher if the mice are maintained in a relatively germ-free environment.

Wyatt was saying, "We could keep you in a germ-free environment, back at the lab.

She realized that she had forgotten all about her earlier demand to have the child arrive into a sterile, germ-free environment.