noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Any of several disorders of the eye (spherical or cylindrical) resulting from faulty refractive ability. countable, uncountable
2. 2
   (ophthalmology) faulty refraction of light rays in the eye as in astigmatism or myopia wordnet

Etymology

From a- + Ancient Greek μέτρον (métron, “measure”) + -opia.

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