Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
exhālātĭo, ōnis, f. [exhalo], an exhalation, vapor (class.): exhalationes terrae, Cic. Tusc. 1, 19, 43; Sen. Q. N. 2, 10; Plin. 31, 3, 27, § 44; Pall. 1, 7, 4.