A tunnel which allows workers to maintain pipes which transport steam between a central boiler and buildings to be heated or cooled, usually in a campus setting.

plural of tundra

plural of tuning fork

A species of vole, Microtus oeconomus.

plural of tundra vole

(science fiction) a passageway enabling time travel

(transitive) To make small adjustments to (something) until it is optimal.

(countable) The tuna or tunny / (uncountable) The flesh of this fish, used as food

(dated) Tuna.

(transitive) To make adjustments (to an engine or bicycle drivetrain) in order to improve its performance. / (intransitive) To make preparations for vigorous exercise; to warm up.