σπλήν
From LSJ
εἰ ἀποκρυπτόντων τῶν Μήδων τὸν ἥλιον ὑπὸ σκιῇ ἔσοιτο πρὸς αὐτοὺς ἡ μάχη καὶ οὐκ ἐν ἡλίῳ → if the Medes hid the sun, the battle would be to them in the shade and not in the sun
English (LSJ)
ὁ, gen. σπληνός:—
A milt, spleen, Hdt.2.47, Hp.VM22, Ar. Fr.506.4, Antiph.222.8; τὸν σ. ἐκβαλεῖν, of one dying with anxiety, Ar.Th.3. 2 pl. σπλῆνες, affections of the spleen, Hp.Aph.3.22. 3 αἰγὸς σ., = μολόχη, mallow, Ps.-Dsc.2.118. II = σπληνίον 1, Hp.Off.12. (Prob. cogn. with σπλάγχνον and with Skt. plīhán-, Lat. lien, Slav. slèzena, Lith. blužnìs.)
German (Pape)
[Seite 922] ὁ, gen. σπληνός, die Milz; Her. 2, 47; πρὶν τὸν σπλῆνα κομιδῇ μ' ἐκβαλεῖν, Ar. Thesm. 3; Plat. Tim. 72 c im plur., Milzsucht. – Auch ein Verband, wie σπλήνιον.