Definition of plastid
: any of various cytoplasmic organelles (such as an amyloplast or chloroplast) of photosynthetic organisms (such as plants) that serve in many cases as centers of special metabolic activities (such as starch storage)
plastidialplay \pla-ˈsti-dē-əl\ adjective
Origin and Etymology of plastid
German, from Greek plastos molded
First Known Use: 1885
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