trisomy

[ trahy-soh-mee ]
/ ˈtraɪ soʊ mi /

noun Pathology.

an abnormality characterized by the presence of an additional chromosome to the normal diploid number.

Origin of trisomy

First recorded in 1925–30; tri- + -some3 + -y3
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for trisomy

British Dictionary definitions for trisomy

trisomy

/ (ˈtraɪsəʊmɪ) /

noun

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

Derived Forms

trisomic (traɪˈsəʊmɪk), adjective

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

Medicine definitions for trisomy

trisomy

[ trī-sōmē, trīsō′- ]

n.

The condition of having three copies of a given chromosome or chromosome segment in each somatic cell rather than the normal number of two.

Related forms

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

Science definitions for trisomy

trisomy

[ trī-sōmē, trīsō′- ]

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.