caffeinenoun [ U ] uk
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/ˈkæf.iːn/ us
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/ˈkæf.iːn/
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a stimulant chemical (= something that makes people more active) that is found in food and drink made from some plants, including coffee, tea and chocolate
“SMART 词汇”：相关单词和短语
Specific types of drug
acaricide
alprazolam
amnesiac
anaphrodisiac
angel dust
digoxin
dimethyltryptamine
dissociative
DMT
E, e
ganja
narcotic
non-addictive
opium
salvia
semaglutide
skinny jab
skunk
skunkweed
visionary
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来自文学作品的示例
Caffeine wakes us up and gives us energy. Many people like tea and coffee because of the caffeine in these drinks. Effects of Tea and Coffee. —In addition to the stimulating agent caffeine, tea and coffee contain a bitter, astringent substance, known as tannin. In chemical composition caffeine closely resembles a waste, called uric acid, and in the body is converted into this substance. Tea and coffee contain a drug, called caffeine, which acts upon the nervous system and which may, on this account, interfere with the proper control of the heart. The first trial to combat or prevent this drowsiness was made with caffeine. They are usually so addicted to caffeine, cigarettes, alcohol, and so forth, that when they had fasted, even briefly, their bodies were forced to dip into highly-polluted fat reserves while simultaneously the body begins withdrawal.
(caffeine在剑桥高级学习词典和同义词词典中的解释 © Cambridge University Press)