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tropeolin

[troh-pee-uh-lin]
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noun Chemistry.
  1. tropaeolin.
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tropaeolin

or tro·pe·o·lin

[troh-pee-uh-lin]
noun Chemistry.
  1. any of a number of orange or yellow azo dyes of complex molecular structure.
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Origin of tropaeolin

1875–80; < New Latin Tropaeol(um) nasturtium, genus of plants yielding the dyes (equivalent to Latin tropae(um) trophy + -olum, neuter of -olus -ole1) + -in2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for tropeolin

tropaeolin

noun
  1. any of certain yellow and orange azo dyes of complex structure
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Word Origin

C19: see tropaeolum, -in
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012