caffeine
part of speech
noun (caffeine)
meaning for a pupil
Caffeine is a natural chemical in coffee, tea, cola, energy drinks and chocolate that makes people feel more awake and alert. tree →
sense in the lessons
In health and science lessons, children learn that caffeine is a stimulant: it can make the heart beat faster and make it hard to sleep, and too much is bad for children. Energy drinks have a lot of caffeine and are not for children; in some countries shops will not sell them to children. Food labels show how much caffeine is in a drink. Phrases: «full of caffeine», «caffeine-free».
examples
- Coffee has caffeine in it. tree →
- Caffeine can stop you sleeping. tree →
- Energy drinks are not for children because of the caffeine. tree →
- Mum drinks caffeine-free tea at night. tree →
- Cola contains some caffeine. tree →
- Dark chocolate has a little caffeine. tree →
- Too much caffeine can make your heart race. tree →
- Check the label to see how much caffeine is in it. tree →
note
Uncountable. Spelling trap: caffeine breaks the «i before e» rule (it is «ei»). Pronounced «KAF-een». «Decaffeinated» or «decaf» means most of the caffeine has been taken out.
In the corpora
- Coffee contains caffeine, which makes the brain feel more awake; people who drink it every morning feel slow and grumpy without it.
- Many of these plants make caffeine or similar chemicals to defend themselves from insects.
- Caffeine in cola and energy drinks keeps you awake, and energy drinks are not for children.
- Water is the best drink for children during sport; energy drinks are full of caffeine and sugar and are not for children.
- Energy drinks are high in caffeine, and many are high in sugar too.
Trees and pragmatics
Every meaning and example of «caffeine» parsed by Mova, each sentence with its dependency tree and frames.