Webster's Online Dictionary
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Definition: HELIANTHIN

Part of Speech Definition
Noun 1. An artificial, orange dyestuff, analogous to tropaolin, and like it used as an indicator in alkalimetry; -- called also methyl orange.[Websters].

Source: Webster's Revised Unabridged Dictionary (1913)

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

Etymology:Helianthin \He`li*an"thin\, noun. [Probably from Latin helianthes, or New Latin helianthus, sunflower, in allusion to its color.]. (references)

Definition: HELIANTHIN

Part of SpeechDefinition
Noun1. An artificial, orange dyestuff, analogous to tropaolin, and like it used as an indicator in alkalimetry; -- called also methyl orange.[Websters].

Source: Webster's Revised Unabridged Dictionary (1913)

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

Etymology:Helianthin \He`li*an"thin\, noun. [Probably from Latin helianthes, or New Latin helianthus, sunflower, in allusion to its color.]. (references)