undercut An ornamental carving cut very deeply and enabling the decoration to stand out from the body of the material and in parts stand free of it.
underframing The structure support that is underneath a table top, seat, dresser or any other kind of cabinet.
underglaze Colours or designs that are applied or cut into ceramics before glazing and firing.
unite A British 17th Century gold £1 coin. King Charles struck triple-unites at Shrewsbury and Oxford mints in the 1640's.
upholsterer's chair A single fabric covered chair.