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Wiktionary
dolichol

n. (context chemistry English) any polyterpenoid having a single hydroxyl group on the terminal carbon atom, and the terminal isoprene residue being saturated; a dihydropolyprenol

Wikipedia
Dolichol

Dolichol refers to any of a group of long-chain mostly unsaturated organic compounds that are made up of varying numbers of isoprene units terminating in an α-saturated isoprenoid group, containing an alcohol functional group.