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1. Any of various instruments used to determine or specify colors, as by comparison with spectroscopic or visual standards.
2. An instrument that measures the concentration of a known constituent of a solution by comparison with colors of standard solutions of that constituent.
col′or·i·met′ric (-ər-ə-mĕt′rĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.