an abnormality characterized by the presence of an additional chromosome to the normal diploid number.
Origin of trisomy
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for trisomy
Contemporary Examples of trisomy
In the eyes of many medical professionals, a child with Trisomy 18 is doomed.
Most prominent in all of the literature: Trisomy 18 is often fatal.
When we are able to pause for a time, Jeff and I read about Trisomy 18.
the condition of having one chromosome of the set represented three times in an otherwise diploid organism, cell, etc. Trisomy of chromosome 21 results in Down's syndrome
Word Origin for trisomy
C20: from tri- + (chromo) som (e) + -y ³
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
Online Etymology Dictionary, © 2010 Douglas Harper
The condition of having three copies of a given chromosome or chromosome segment in each somatic cell rather than the normal number of two.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
The condition of having three copies of a given chromosome in each body cell rather than the normal number of two.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.