Definitions

1. noun

An animal, typically a mouse, that is bred in a germ-free environment for scientific research, especially for studies on the development of the immune system.

“The scientists used a gnotobiote to study the impact of a specific microorganism on the immune system.”

2. noun

An organism that is free of microorganisms, especially in a laboratory setting.

“The gnotobiote was used to test the effectiveness of a new disinfectant.”