noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The presence of three copies, instead of the normal two, of a particular chromosome of an organism. countable, uncountable
2. 2
   chrosomal abnormality in which there is one more than the normal number of chromosomes in a cell wordnet

Synonyms

All synonyms

disomymonosomy

Etymology

From trisome + -y.

Related phrases

full trisomypartial trisomyprimary trisomysecondary trisomytertiary trisomytrisomy 16trisomy 18trisomy 21trisomy 22trisomy 8trisomy 9trisomy X

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.