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cologarithm

[ koh-law-guh-rith-uh m, -rith-uh m, -log-uh- ]
/ koʊˈlɔ gəˌrɪð əm, -ˌrɪθ əm, -ˈlɒg ə- /

noun Mathematics.

the logarithm of the reciprocal of a number, often used in expressing the logarithm of a fraction: log 7/25 = log 7 + colog 25. Symbol: colog

Nearby words

  1. colocholecystostomy,
  2. colocolostomy,
  3. colocynth,
  4. coloenteritis,
  5. colog,
  6. cologne,
  7. cologne brown,
  8. colomb-béchar,
  9. colombard,
  10. colombes

Origin of cologarithm

First recorded in 1880–85; co- + logarithm
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for cologarithm

cologarithm

/ (kəʊˈlɒɡəˌrɪðəm) /

noun

the logarithm of the reciprocal of a number; the negative value of the logarithmthe cologarithm of 4 is log 1/4 Abbreviation: colog
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