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Showing results for caffeine.
Definitions

caffeine

[ka-feen, kaf-een, kaf-ee-in] / kæˈfin, ˈkæf in, ˈkæf i ɪn /
NOUN
coffee
Synonyms
STRONGEST
cappuccino espresso
STRONG
brew decaf decoction demitasse ink java mocha mud perk
WEAK
battery acid café café au lait café noir forty weight hot stuff jamocha joe varnish remover

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

This finding suggests that compounds other than caffeine, such as polyphenols, may be responsible for certain cognitive benefits.

From Science Daily • May 3, 2026

Participants completed psychological assessments, tracked their diet and caffeine intake, and provided stool and urine samples so scientists could analyze changes in gut bacteria and emotional state.

From Science Daily • May 3, 2026

The findings suggest that caffeine could play a role in improving pest control strategies for Argentine ants.

From Science Daily • Apr. 18, 2026

In contrast, ants given low or moderate amounts of caffeine quickly became more efficient.

From Science Daily • Apr. 18, 2026

They were laying off sugar or carbs or caffeine or meat or dairy, but maybe a little butter was fine now and then.

From "We Are Okay" by Nina LaCour