The Collaborative International Dictionary
Tidal \Tid"al\, a. Of or pertaining to tides; caused by tides; having tides; periodically rising and falling, or following and ebbing; as, tidal waters. The tidal wave of deeper souls Into our inmost being rolls, And lifts us unawares Out of all meaner cares. --Longfellow. Tidal air (Physiol.), the air which passes in and out of the lungs in ordinary breathing. It varies from twenty to thirty cubic inches. Tidal basin, a dock that is filled at the rising of the tide. Tidal wave.
See Tide wave, under Tide. Cf. 4th Bore.
A vast, swift wave caused by an earthquake or some extraordinary combination of natural causes. It rises far above high-water mark and is often very destructive upon low-lying coasts.
Wiktionary
n. The (volume of) air that is inhaled and exhaled with each resting breath
Usage examples of "tidal air".
Her blond hair, wet from the tidal air, rustled against her shoulders.
I was now putting the last of it into Moneymaze, the warbling fruit machine by the door to the Gents and its briny, tidal air.
Her first yell of pain had expelled all but the tidal air from her lungs, and now came the paralyzing, eternal moment when she struggled to unlock her chest and draw in breath for the next whoop.