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decaffeinate

[dee-kaf-uh-neyt, -kaf-ee-uh-]
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verb (used with object), de·caf·fein·at·ed, de·caf·fein·at·ing.
  1. to extract caffeine from: to decaffeinate coffee.

Origin of decaffeinate

First recorded in 1925–30; de- + caffein + -ate1
Related formsde·caf·fein·a·tion, nounde·caf·fein·a·tor, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for decaffeinate

decaffeinate

verb
  1. (tr) to remove all or part of the caffeine from (coffee, tea, etc)
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

Word Origin and History for decaffeinate

v.

1909 (implied in decaffeinated), from de- + caffeine + -ate (2).

Online Etymology Dictionary, © 2010 Douglas Harper