πρόσ-κρουσμα,ατος,τό,
A. that against which one strikes, obstacle, Arist. PA 658a7 (pl.).
2. knock,
Hippiatr. 96 .
II. stumblingblock, cause of offenceorfriction, D. 54.3 (pl.), J. BJ 1.26.3 (pl.); πολιτικὰ π. τοῖς δημάρχοις πρὸς τοὺς ὑπάτους συνέστη
D.H. 10.31
, cf. 4.25 ;τὰ περὶ τὴν σιτοδοσίαν π. Id. 7.45 .—The formπρόσκρουμα(which is preferred by Thom.Mag. p.317 R., citing Aristid. 1.455
J. ) freq. occurs in the same Mss. asπρόσκρουσμα, cf. Plu. 2.137c with 141b , al.