ψῦχος · psychos — LSJ
cold, Emp. 65.2; opp. θάλπος, Hp. Aph. 3.4; opp. ἀλέα, Arist. HA 598a1; opp. καύματα, Id. Mete. 362b17; ἐν ψύχει in winter-time, S. Ph. 17; ἐν τῷ ψ. καθηῦδον Pl. Smp. 220d; ψ., = ῥῖγος, Hermipp. 97: pl. ψύχεα frosts, cold weather, Hdt. 4.28, 129, 5.10; ψύχη X. Oec. 5.4, Cyn. 5.9; ἐν τοῖς σφόδρα ψ. καὶ ἐν ταῖς σφόδρα ἀλέαις Arist. HA 599a19, cf. Mete. 379a26; sg., Hp. VM 16.
once in Hom., coolness, ψύχεος ἱμείρων Od. 10.555: metaph., ψ. ἐν δόμοις πέλει A. Ag. 971.