noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A genetic disorder with the presence of only one chromosome (instead of the typical two in humans) from a pair. countable, uncountable
2. 2
   chromosomal abnormality consisting of the absence of one chromosome from the normal diploid number wordnet

Synonyms

All synonyms

trisomy

Etymology

From monosome + -y.

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