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

 

mitochondrion

 noun
noun
BrE BrE//ˌmaɪtəʊˈkɒndriən//
 
; NAmE NAmE//ˌmaɪtoʊˈkɑːndriən//
 
(pl. mitochondria
BrE BrE//ˌmaɪtəʊˈkɒndriə//
 
; NAmE NAmE//ˌmaɪtoʊˈkɑːndriə//
 
)
(biology) Cell biology
 
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a small part found in most cells, in which the energy in food is released See related entries: Cell biology Word Origin early 20th cent.: modern Latin, from Greek mitos ‘thread’ + khondrion (diminutive of khondros ‘granule’).
See the Oxford Advanced American Dictionary entry: mitochondrion