Definition of tae kwon do for English Language Learners. : a style of fighting that originated in Korea and that uses kicks and punches but no weapons. Britannica.com: Encyclopedia article about tae kwon do.
It is also used in the baking process as a leavening agent; yeast releasing gas into their environment results in the spongy-like texture of breads and cakes. Because of its role in fermentation, humans have known about and used Saccharomyces cerevisiae for a long time.
Autolyzed yeast extract, is a food ingredient or additive that comes as a liquid, paste, powder, or in a granular state. It is used as a flavoring agent or enhancer, and as a firming agent. It comes from yeast that has been specially treated. Autolyzed yeast is produced by the allowing the peptide bonds of the proteins in the yeast to hydrolyze.