LSJ
ατος, τό, [ἆσθμα DGE] short-drawn breath, panting, ἄσθμα καὶ ἱδρώς Il. 15.241; ἀργαλέῳ ἄσθματι ib. 10; ὑπ’ ἄσθματος κενοί A. Pers. 484; ἄσθματι στρευγόμενος Tim. Pers. 93; ὑπὸ ἄσθματος ἀδυνατεῖν Pl. R. 568d, cf. 556d; as symptom of anger, Phld. Ir. p. 27 W. ; death-rattle, Pi. N. 10.74. Medic., asthma, Hp. Aph. 3.22 (pl.), etc.
breath, breathing, Mosch. 3.53, Luc. DDeor. 11.2, Philum. Ven. 36.3; blast, ἀρκτῴοις ἄσθμασι AP 9.677 (Agath.); ἄ. φλογός Coluth. 179; κεραυνοῦ Nonn. D. 1.2. (On the accent v. Hdn. Gr. 1.522.)
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)