σειρίασις
From LSJ
οἷς τὰ ὁρώμενα τὴν ἀρχὴν ἐνδίδωσι, καὶ οἷον ὑπήνεμα διὰ τῶν ὀφθαλμῶν τὰ πάθη ταῖς ψυχαῖς εἰστοξεύονται → who taketh his beginning and occasion from something which is seen, and then his passion, as though wind borne, shoots through the eyes and into the heart
English (LSJ)
εως, ἡ (not σιρ-), heat-stroke, Sor.1.124, Orib.Syn.5.13, Paul.Aeg.1.13.
German (Pape)
[Seite 868] ἡ, eine durch Sonnenbrand oder Erhitzung bei Menschen u. Thieren entstehende Krankheit, Sonnenstich, sideratio; die Schreibung σιρίασις ist falsch; Medic.