A surname. / Ellipsis of McCool.; A surname from Irish, anglicized form of McCool.

(imperative) Used to implore someone to not reveal illegal or improper activity.

Cooled by air (such as an engine, rather than by other means such as water).

(of a nuclear reactor) that uses liquid sodium as a coolant

simple past tense and past participle of cool down

simple past tense and past participle of cool off

using water as a means of cooling.

simple past tense and past participle of cool one's heels

simple past tense and past participle of cool one's jets

The process of cooling computer components via the Peltier effect.