[ sis-tron ]
/ ˈsɪs trɒn /

noun Genetics.

a segment of DNA that encodes for the formation of a specific polypeptide chain; a structural gene.

Origin of cistron

First recorded in 1955–60; cis- + tr(ans)- + -on1


cis·tron·ic, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for cistron

/ (ˈsɪstrən) /


genetics the section of a chromosome that encodes a single polypeptide chain

Word Origin for cistron

C20: from cis-trans; see cis-trans test
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

Medical definitions for cistron

[ sĭstrŏn′ ]


The smallest functional unit of heredity; a length of chromosomal DNA associated with a single biochemical function and essentially equivalent to a gene.

Other words from cistron

cis•tronic adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for cistron

[ sĭstrŏn′ ]

A section of DNA that contains the genetic code for a single polypeptide and functions as a hereditary unit.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.