|1.||obsolete scum on the surface of a liquid, esp on an old specimen of urine|
|2.||med the arrest or checking of a bodily discharge, esp bleeding|
|3.||genetics Also called: hypostasis the suppression by a gene of the effect of another gene that is not its allele|
|[C19: from Greek: a stopping, from ephistanai to stop, from |
epistasis e·pis·ta·sis (ĭ-pĭs'tə-sĭs)
n. pl. e·pis·ta·ses (-sēz')
A film that forms over the surface of a urine specimen.
The suppression of a bodily discharge or secretion.