Definitions for "Culture medium"
A substance that promotes the growth of micro-organisms. Laboratories most commonly use agar gel, made from seaweed. Dead tissue is an ideal culture medium. Never use substances to clean a piercing that can kill tissue, e.g. alcohol, for the dead tissue then becomes a culture medium for bacteria.
The fluid in which cells or tissues, including eggs, sperm and embryos, are grown. It consists of water, salts and nutrients. Different media have turned out best for different purposes. In the early days of in vitro fertilisation, several different media seemed to produce equal results: examples included Ham's F10, Whittingham's T6. Quinn's medium (said to be based on human tubal fluid, though in reality different to the fluid in the fallopian tube) produced better results than the first generation media. Today's third generation media, or stage specific media, give superior results and are used increasingly. Plural: culture media.
The substance that provides nutritional and environmental support for eggs, sperm and embryos in the laboratory