User:Andrewdw

gnotobiotic  definition 1. Of or relating to gnotobiology. 2. Free of germs or associated only with known or specified germs a gnotobiotic animal would be one in which there are no associated bacteria living in or on it with reference to the mouth in a gnotobiotic condition, periodontal disease is never developed ie if it were possible to remove all bacteria from the mouth no gum disease would ever develop