λιθίδιον
From LSJ
χρὴ τῶν ἀγαθῶν διακναιομένων πενθεῖν ὅστις χρηστὸς ἀπ' ἀρχῆς νενόμισται → when a good man is hurt, all who would be called good must suffer with him | when good men are being dragged down, anyone with worthy credentials must feel their pain | when the noble are afflicted, those who all their lives have been deemed loyal must mourn
English (LSJ)
τό, Dim. of λίθος,
A pebble, gem, Pl.Phd.110d, Arist.Pr. 934b22, Plu.2.979b, Luc.Hist.Conscr.4. 2 gravel in the urine, Hp. Coac.578 (pl.); stone in the bladder, Paul.Aeg.6.60 (sg.).