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.

"We found that caffeine can reverse these disruptions at both the molecular and behavioral levels. Its ability to do so suggests that caffeine's benefits may extend beyond simply helping us stay awake."

From Science Daily • May 30, 2026

This targeted action meant that animals in the control group that had not experienced sleep deprivation did not show signs of excessive neural stimulation despite receiving caffeine.

From Science Daily • May 30, 2026

At the other end, robusta beans, known for their high levels of caffeine, are mass harvested by machines.

From BBC • May 28, 2026

Their cafes are not designed for seating, but for the rapid delivery of caffeine, ordered by apps.

From BBC • May 28, 2026

“Run along now and have your cup of caffeine solution, dear,” she said to the other nurse.

From "Brave New World" by Aldous Huxley

caffeine

Example Sentences

Related Words