Webster's Online Dictionary
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Definition: ACHROMATOPSY

Part of Speech Definition
Noun 1. Color blindness; inability to distinguish colors; Daltonism.[Websters].

Source: Webster's Revised Unabridged Dictionary (1913)

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Date "Achromatopsy" was first used in popular English literature: sometime before 1914. (references)

Etymology:Achromatopsy \A*chro"ma*top"sy\, noun. [from Greek expression 'a priv. color sight.]. (references)

Definition: ACHROMATOPSY

Part of SpeechDefinition
Noun1. Color blindness; inability to distinguish colors; Daltonism.[Websters].

Source: Webster's Revised Unabridged Dictionary (1913)

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Date "ACHROMATOPSY" was first used in popular English literature: sometime before 1914. (references)

Etymology:Achromatopsy \A*chro"ma*top"sy\, noun. [from Greek expression 'a priv. color sight.]. (references)