gram complex

gram complex
\\ˈgram-\ noun
Usage: usually capitalized G
Etymology: after Hans Christian Joachim Gram died 1938 Dan. physician
: the part of a gram-positive bacterial cell responsible for the characteristic staining by Gram's method and usually considered to be a layer of ribonucleate in complex association with polysaccharides and protein immediately underlying the cell wall

Useful english dictionary. 2012.

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