Definition of Hydroxyl Group

The hydroxyl functional group is an oxygen-containing group based on an alcohol or OH group.
The hydroxyl functional group is an oxygen-containing group based on an alcohol or OH group. Ben Mills

Hydroxyl Group Definition: The hydroxyl group is a functional group consisting of a hydrogen atom covalently bonded to an oxygen atom.

The hydroxyl group is denoted by -OH in chemical structures and has a valence charge of -1.