arabinogalactan
/əˌrabɪnəʊɡəˈlaktan/(also arabinogalactane) Biochemistry
noun
Any of a class of neutral polysaccharides composed of arabinose and galactose units and found in the cell walls of plants and mycobacteria.
Origin
1920s; earliest use found in Chemical Abstracts. From arabino- + galactan, after French arabinogalactane.