rēspīrātus, ūs, m. [respiro],
a drawing breath , inhaling , inspiration; only Cic. N. D. 2, 55, 136 (dub. Orell. N. cr.; Bait. intrante spiritu), and Ap. Met. 4, 15, 10.
(respīrātus ūs), m respiro, an inhalation, inspiration : qui (pulmones) in respiratu dilatant. ...
An Elementary Latin Dictionary