lipopolysaccharide

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lip·o·pol·y·sac·cha·ride

 (lĭp′ō-pŏl′ē-săk′ə-rīd′, lī′pō-)
n.
Any of a group of polysaccharides in which a lipid constitutes a portion of the molecule, found in the outer cell wall of gram-negative bacteria.

lip•o•pol•y•sac•cha•ride

(ˈlaɪp oʊˌpɒl iˈsæk əˌraɪd, -rɪd, ˈlaɪ poʊ-)

n.
any of a class of polysaccharides to which lipids are attached.
[1950–55]