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chloroplast Line breaks: chloro|plast
Pronunciation: /ˈklɔːrə(ʊ)plast/
/ˈklɔːrə(ʊ)plɑːst/ /ˈklɒrə(ʊ)plast/ /ˈklɒrə(ʊ)plɑːst/

Definition of chloroplast in English:


A plastid in green plant cells which contains chlorophyll and in which photosynthesis takes place.
Example sentences
  • Fluorescence of guard cell chloroplasts was imaged when plants were at approximately the six-leaf stage.
  • As Zeiger et al. have recently emphasized, guard cell chloroplasts show remarkable functional plasticity.
  • Even in the late stages of leaf senescence, the chloroplasts of guard cells remain green and functional.


Late 19th century: coined in German from Greek khlōros 'green' + plastos 'formed'.

Definition of chloroplast in:
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