Pasteur's fluid \Pas`teur's" flu"id\ (Biol.)
An artificial nutrient fluid invented by Pasteur for the
study of alcoholic fermentation, but used also for the
cultivation of bacteria and other organisms. It contains all
the elements of protoplasm, and was originally made of the
ash of yeast, some ammonia compound, sugar, and water.
[Webster 1913 Suppl.]