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
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noun
An inability or defective ability to perceive or distinguish certain colors, especially red-green color blindness.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable
Topics: medicine, pathology, sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Achromatopsia.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Alternative letter-case form of Daltonism.
Definition source: English Wiktionary via Wiktextract
Usage: alt-of, uncountable
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
dichromacy characterized by a lowered sensitivity to green light resulting in an inability to distinguish green and purplish-red
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: deuteranopia, green-blindness
Antonyms: none provided
Broader terms: red-green dichromacy, red-green color blindness, red-green colour blindness
History
From Dalton + -ism. Named after John Dalton (1766–1844), who suffered from the condition and conducted early research on it.
Across languages
11 source translations are retained for this English entry.
