英语词汇“colour index”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

colour index

(US color index)

noun

1 Medicine the ratio of the quantity of haemoglobin to the number of red blood cells present in a blood sample (now rare ).

2 Astronomy a number representative of the colour (and hence the temperature) of a star, equal to the difference in its magnitude (brightness) at two chosen wavelengths, typically blue and green-yellow, or ultraviolet and blue.

3 Geology a number expressing the percentage of dark-coloured minerals (typically ferromagnesian ones) in an igneous rock.

Origin

Mid 19th century; earliest use found in British Journal Homoeopathy.

单词	colour index
释义	colour index (US color index) noun 1 Medicine the ratio of the quantity of haemoglobin to the number of red blood cells present in a blood sample (now rare ). 2 Astronomy a number representative of the colour (and hence the temperature) of a star, equal to the difference in its magnitude (brightness) at two chosen wavelengths, typically blue and green-yellow, or ultraviolet and blue. 3 Geology a number expressing the percentage of dark-coloured minerals (typically ferromagnesian ones) in an igneous rock. Origin Mid 19th century; earliest use found in British Journal Homoeopathy.
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