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Webster 1913 Edition

Helianthin

Heˊli-an′thin

,
Noun.
[Prob. fr. L.
helianthes
, or NL.
helianthus
, sunflower, in allusion to its color.]
(Chem.)
An artificial, orange dyestuff, analogous to tropaolin, and like it used as an indicator in alkalimetry; – called also
methyl orange
.

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