To gauge the amount of empty space between the top of a cask and the level of liquid inside it.

plural of ultimatum

Alternative form of Ulaanbaatar

The capital city of Mongolia.

Extremely modern.

A dialect of the Scots language spoken in Ulster, Ireland. / The descendants of Scottish settlers in the Irish province of Ulster, mostly in present-day Northern Ireland.

Alternative spelling of ultra-high

affected with ulcers

the science and technology of ultrasound

plural of ulcus