μεῖον · meion — LSJ
lamb or sheep offered at the Athenian Apaturia by a father who was enrolling his son among his φράτερες, τοῦ μείου IG 2(2).1237.5; τὰ μεῖα ib. 60; παρέστησε μεῖον Is. Fr. 124: expld. by Sch. Ar. Ra. 810 (cf. Eratosth. and Apollod. ap. Harp.) as neut. of μείων, too light! from the cry of the φράτερες when the lamb was weighed; cf. μειαγωγέω.