Standard Lemma guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
No pronunciation record was provided for this word.
noun
A form of color blindness. Involves a defect in distinguishing between red and green.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable, usually
Topics: medicine, pathology, sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
dichromacy characterized by lowered sensitivity to long wavelengths of light resulting in an inability to distinguish red and purplish blue
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: red-blindness
Antonyms: none provided
Broader terms: red-green dichromacy, red-green color blindness, red-green colour blindness
History
From proto- (“first (color)”) + an- (“without”) + -opia (“vision”).
Across languages
7 source translations are retained for this English entry.
