color indices

color index

noun Astronomy.
1.
the difference between the apparent photographic magnitude and the apparent visual magnitude of a star.
2.
the difference between the magnitudes of a star in any two spectral regions.

Origin:
1920–25

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
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