epistasis

[ ih-pis-tuh-sis ]
/ ɪˈpɪs tə sɪs /

noun, plural e·pis·ta·ses [ih-pis-tuh-seez] /ɪˈpɪs təˌsiz/.

Genetics. a form of interaction between nonallelic genes in which one combination of such genes has a dominant effect over other combinations.
Medicine/Medical.
  1. the stoppage of a secretion or discharge.
  2. a scum that forms on a urine specimen upon standing.

Origin of epistasis

First recorded in 1915–20, epistasis is from the Greek word epístasis stopping, stoppage. See epi-, stasis
Related formsep·i·stat·ic [ep-uh-stat-ik] /ˌɛp əˈstæt ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for epistasis

epistasis

/ (ɪˈpɪstəsɪs) /

noun

obsolete scum on the surface of a liquid, esp on an old specimen of urine
med the arrest or checking of a bodily discharge, esp bleeding
Also called: hypostasis genetics the suppression by a gene of the effect of another gene that is not its allele
Derived Formsepistatic (ˌɛpɪˈstætɪk), adjective

Word Origin for epistasis

C19: from Greek: a stopping, from ephistanai to stop, from epi- + histanai to put
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for epistasis

epistasis


n.

medical Latin, from Greek epistasis "a stopping, stoppage," from epi "upon" (see epi-) + stasis "a stopping or standing" (see stasis).

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for epistasis

epistasis

[ ĭ-pĭstə-sĭs ]

n. pl. e•pis•ta•ses (-sēz′)

A film that forms over the surface of a urine specimen.
An interaction between nonallelic genes, especially an interaction in which one gene suppresses the expression of another.
The suppression of a bodily discharge or secretion.
Related formsep′i•static (ĕp′ĭ-stătĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.