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molecule

noun [C]
 
 
/ˈmɒl.ɪ.kjuːl/ US  /ˈmɑː.lɪ-/

Definition

the simplest unit of a chemical substance, usually a group of two or more atomsAtoms, molecules and sub-atomic particles molecular
 
 
/məˈlek.jʊ.lər/ US  /-lɚ/ adjective
Atoms, molecules and sub-atomic particles
(Definition of molecule noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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