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English definition of “alkaloid”

alkaloid

noun [C]     /ˈæl.kə.lɔɪd/ specialized
a type of chemical found in plants that often acts as a drug or poison , or is used in medicines : Morphine and cocaine are powerful alkaloids.Types of chemicalSpecific chemicals, chemical compounds and gasesSubstances and structures in the body
(Definition of alkaloid noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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