decaffeinate

American  

[dee-kaf-uh-neyt, -kaf-ee-uh-] / diˈkæf əˌneɪt, -ˈkæf i ə- /

verb (used with object)

decaffeinated, decaffeinating

1. to extract caffeine from.

   to decaffeinate coffee.

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decaffeinate British  

/ dɪˈkæfɪˌneɪt /

verb

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

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Other Word Forms

• decaffeination noun
• decaffeinator noun

Etymology

Origin of decaffeinate

First recorded in 1925–30; de- + caffein + -ate ¹

Example Sentences

Researchers analyzed how consumption of caffeinated coffee, tea, and decaffeinated coffee related to long-term brain health outcomes.

From Science Daily

All these methods, which are also used to make decaffeinated tea, start with green, or unroasted, coffee beans that have been premoistened.

From Salon

In the CO₂ method, liquid carbon dioxide is pumped into a high-pressure chamber with the beans, where it binds to the caffeine and is then removed through high pressure, leaving behind decaffeinated beans.

From Salon

The researchers found that increasing unsweetened caffeinated or decaffeinated coffee intake by one cup a day was associated with a weight gain that was 0.12 kg less than expected over four years.

From Salon

I found a natural way to decaffeinate a tea: steep for 30 seconds, then toss out the liquid and brew the same tea bag in fresh hot water.

From Seattle Times