noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Down syndrome; mongolism obsolete, uncountable
2. 2
   a congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation wordnet

Synonyms

All synonyms

albinismamentiaarrested developmentcolor blindnesscretinismdown syndrome

Etymology

From Mongolian + -ism.

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