Term: theophylline
IPA: θi.əˈfɪl.iːn, θiˈɑf.əl.ɪn

{{also|théophylline}}

==English==
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===Etymology===
{{ety|en|:af|mul:Thea<t:former genus name for the [[tea plant]]>|grc:φύλλον<t:leaf>|-ine|text=+|tree=1}}

===Pronunciation===
* {{IPA|en|/θi.əˈfɪl.iːn/|/θi.əˈfɪl.ɪn/|a=RP}}
* {{IPA|en|/θiˈɑf.əl.ɪn/|a=GA}}
* {{rhymes|en|ɪlɪn|s=4}}

===Noun===
{{en-noun|-}}

# {{lb|en|organic chemistry|pharmaceutical drug}} A bitter [[crystalline]] [[compound]] present in small quantities in [[tea leaves]], [[isomeric]] with [[theobromine]]; used as a drug