noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The inability to see clearly in dim light; night blindness countable, uncountable
2. 2
   inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disorder wordnet

Synonyms

All synonyms

moon blindnessnight blindnessnight blindness

Antonyms

All antonyms

hemeralopia

Etymology

Borrowed from Ancient Greek νυκταλωπία (nuktalōpía), from νύξ (núx, “night”), ἀλαός (alaós, “blind”), and ὄψ (óps, “eye”).

Related phrases

night blindness

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