An alcohol or phenol.
[The final element of alcohol.]
An alcohol is an organic compound containing a hydroxyl group, —OH; a phenol is a compound containing that group linked directly to a benzene ring, with phenol itself being the simplest example. Some others are glycerol (Greek glukeros, sweet), an alcohol containing three hydroxyl groups, a viscous liquid formed as a by-product in soap manufacture; cholesterol (Greek kholē, bile, plus stereos, stiff), a substance found in most body tissues, of which high concentrations in the blood are thought to promote atherosclerosis; mannitol, a compound found in many plants which is used in various foods and medical products. Some of the more frequently encountered aliphatic (straight carbon chain) alcohols have systematic names ending in -ol in addition to their common ones: ethanol is better known as ethyl alcohol or just alcohol; propanol is also known as propyl alcohol.
See also -ole1.