Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

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)
Focus on the pronunciation of molecule