n.
Pronunciation: ' plas-t ə d
Function: noun
Etymology: German, from Greek plastos molded
Date: 1885
: any of various cytoplasmic organelles (as an amyloplast or chloroplast) of photosynthetic cells that serve in many cases as centers of special metabolic activities
– plas · tid · i · al \ pla- ' sti-d ē - ə l \ adjective