柯林斯詞典theophylline /?θ???f?li?n, -?n, θ???f?l?n/ 1. N a white crystalline slightly water-soluble alkaloid that is an isomer of theobromine: it occurs in plants, such as tea, and is used to treat asthma. Formula: C7H8N4O2 茶堿 返回 theophylline