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polyuronide

noun
poly·​uro·​nide | \-nə̇d\
plural -s

Definition of polyuronide 

: a polymeric substance consisting of uronic acid units with glycosidic linkages often in combination with monosaccharides and occurring widely in plants (as in gums and pectic substances) and in soils the polyuronide hemicelluloses are cell wall components widely distributed in the plant world— J. F. Bonner

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History and Etymology for polyuronide

International Scientific Vocabulary polyuronic (in polyuronic acid) + -ide

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