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# caffeine

«caffeine» in Mova's school dictionary: **a natural chemical in coffee, tea, cola, energy drinks…** — its meaning for a pupil, its sense in the lessons and examples, with 5 sentences of Mova's corpora that use it.

### 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 →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/caffeine/#m1)

### 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 →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/caffeine/#x1)
- Caffeine can stop you sleeping. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/caffeine/#x2)
- Energy drinks are not for children because of the caffeine. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/caffeine/#x3)
- Mum drinks caffeine-free tea at night. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/caffeine/#x4)
- Cola contains some caffeine. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/caffeine/#x5)
- Dark chocolate has a little caffeine. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/caffeine/#x6)
- Too much caffeine can make your heart race. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/caffeine/#x7)
- Check the label to see how much caffeine is in it. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/caffeine/#x8)

### 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.](https://md.mova.elamur.ai/free/en/corpora/school/adult-life/27-coffee-tea-wine-and-the-pub/5/)
- [Many of these plants make caffeine or similar chemicals to defend themselves from insects.](https://md.mova.elamur.ai/free/en/corpora/school/biology/347-sugar-chocolate-tea-and-coffee-the-plants-behind-treats/8/)
- [Caffeine in cola and energy drinks keeps you awake, and energy drinks are not for children.](https://md.mova.elamur.ai/free/en/corpora/school/everyday/80-sleep-and-healthy-eating/7/)
- [Water is the best drink for children during sport; energy drinks are full of caffeine and sugar and are not for children.](https://md.mova.elamur.ai/free/en/corpora/school/medicine/50-heat-sun-and-cold-on-sports-day/7/)
- [Energy drinks are high in caffeine, and many are high in sugar too.](https://md.mova.elamur.ai/free/en/corpora/school/medicine/52-energy-drinks-why-theyre-not-for-kids/4/)

### Trees and pragmatics

[Every meaning and example of «caffeine» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/caffeine/), each sentence with its dependency tree and frames.