Definition of "epistasis" [epistasis]

• An interaction between nonallelic genes, especially an interaction in which one gene suppresses the expression of another. (noun)
• A film that forms over the surface of a urine specimen. (noun)
• The suppression of a bodily discharge or secretion. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "These genetic interactions, termed epistasis, can impact all aspects of organisms and play"
• "There is "epistasis," which means that some gene variants behave differently depending on what variants of other genes are present, but this changes the outcome little in practice."
• "IC systems have components that exihibit this kind of epistasis, they exhibit numerous interdependencies."