phragmosome

noun
phrag·mo·some | \ˈfragməˌsōm\
plural -s

Definition of phragmosome 

: a differentiated cytoplasmic diaphragm that develops from the strands of parietal cytoplasm during cell division in plant cells and forms a medium in which the phragmoplast and cell plate develop

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History and Etymology for phragmosome

phragmo- (from Greek phragmos fence) + -some

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