χῖδρον
From LSJ
Βίων δύο ἔλεγε διδασκαλίας εἶναι θανάτου, τόν τε πρὸ τοῦ γενέσθαι χρόνον καὶ τὸν ὕπνον → Bion used to say that we have two teachers for death: the time before we were born and sleep | Bion said that there are two rehearsals for death: the time before being born and sleep
English (LSJ)
τό, mostly in pl. χῖδρα, τά,
A unripe wheaten-groats, rubbed from the ear in the hands, Ar.Eq.806 (anap.), Pax595 (troch.) (cf. Sch. ad locc., Suid.), PCair.Zen.129.13 (iii B. C.), Alex.Trall.1.13, 2.1, al.; νέα πεφρυγμένα χ. LXX Le.2.14, cf. 23.14: sg., Alcm.75; χίδρα, ἡ, is corrupt in Hsch.; χέδρα is v.l. in Ph.1.180.