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

 

chloroplast

 noun
noun
BrE BrE//ˈklɒrəplɑːst//
 
; NAmE NAmE//ˈklɔːrəplæst//
 
(biology) Cell biology
 
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the structure in plant cells that contains chlorophyll and in which photosynthesis takes place See related entries: Cell biology Word Origin late 19th cent.: coined in German from Greek khlōros ‘green’ + plastos ‘formed’.
See the Oxford Advanced American Dictionary entry: chloroplast