ῥόπτρον

A. the wood in a trap which falls when touched and catches the mouse, Archil. 90, Poll. 7.115: metaph., δίκης ἔπαισεν αὐτὸν ῥ. E. Hipp. 1172.

II. musical instrument of the Corybantes, tambourine or kettle-drum, Corn. ND 30, Luc. Trag. 36, Orph. Frr. 105,152, AP 6.74 (Agath.); ῥ. βυρσοπαγῆ καὶ κοῖλα περιτείναντες ἠχείοις χαλκοῖς Plu. Crass. 23; cf. ῥόμβος A. 1.3.

III. knocker on a door, E. Ion 1612 (troch.), Ar. Fr. 39, Lys. 6.1, X. HG 6.4.36; cf. ῥόπαλον 111.