noun🔗ShareAny of many organic heterocyclic bases that occur in nature and often have medicinal properties."The coffee bean contains caffeine, which is a stimulating alkaloid. "medicinechemistrysubstancecompoundphysiologybiochemistrybiologyplantChat with AIVocabulary GamePractice Reading
adjective🔗ShareRelating to, resembling, or containing alkali."The coffee's alkaloid bitterness kept him awake during the long study session. "chemistrysubstancecompoundChat with AIVocabulary GamePractice Reading
