Definition of platoon noun from the Oxford Advanced Learner's Dictionary

 

platoon

 noun
noun
BrE BrE//pləˈtuːn//
 
; NAmE NAmE//pləˈtuːn//
 
 
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a small group of soldiers that is part of a company and commanded by a lieutenant Word Origin mid 17th cent.: from French peloton ‘platoon’, literally ‘small ball’, diminutive of pelote.
See the Oxford Advanced American Dictionary entry: platoon