caffeine

[ˈkæf.iːn]
nounfemininepl: cafeínas
cafeína
1. A bitter alkaloid compound found naturally in coffee, tea, and cacao plants that acts as a central nervous system stimulant
This coffee contains a high amount of caffeine.
Este café contém uma grande quantidade de cafeína.
2. The chemical substance used in beverages and medicines to increase alertness and reduce fatigue
She drinks caffeine every morning to stay awake during work.
Ela bebe cafeína todas as manhãs para ficar acordada durante o trabalho.
Caffeine is deeply embedded in both Brazilian and American cultures. In Brazil, coffee (café) is a central social ritual, and cafeína consumption is part of daily life, with 'café' being offered as a sign of hospitality. In the USA, caffeine dependency is culturally normalized, with coffee shops serving as social hubs. Energy drinks with high caffeine content are particularly popular among younger Americans.
NYC Slang
juice (informal reference to coffee or energy drinks)
Synonyms / Sinônimos
stimulantalkaloidcoffee extract
Antonyms / Antônimos
depressantsedative

Regional Variations

General Brazilian
cafeína
Standard term used across Brazil
Rio de Janeiro
cafeína
No regional variation; same as standard
São Paulo
cafeína
No regional variation; same as standard
Portugal
cafeína
Identical to Brazilian Portuguese; European Portuguese uses the same term

Related Words

coffeeteaenergy drinkstimulantalertawake

Related Idioms & Phrases

caffeine boost
caffeine fix
caffeine addict
running on caffeine
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