(chemistry) An item of laboratory equipment consisting of a simple pipette with a very long, fine nose and a rubber bulb, used to draw small amounts of liquid from a chemical liquid or solution. Often used to separate two phases in a small sample.

plural of Pasteur pipette

An artificial nutrient fluid invented 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 It contains all the elements of protoplasm, and was originally made of the ash of yeast, some ammonia compound, sugar, and water.