κροῦσις,εως,ἡ,
A. striking, smiting, collision,αἱ πρὸς ἀλλήλας κ., of atoms, Epicur. Nat.Herc. 1431.16 ; ἡ πρὸς ἄλληλα κ. τῶν ὅπλων
Plu. Aem. 32
;ποδὸς κρούσει χρώμενος spurringwith the heel, of a rider, Id. Alex. 6 .
2. tappingorringingof earthen vessels, to see whether they are sound: hence, generally,scrutiny, Suid.
3. metaph., of sophisticalattempts to deceive, chicanery, Ar. Nu. 318 .
4. playing on a stringed instrument, Plu. Per. 15 , 2.1137b , etc.: generally,instrumental music, Plb. 30.22.5 ; κρούσεις καὶ μέλη
Phld. Mus. p.13
K.;παρὰ τὴν κροῦσιν λέγειν, of the recitative,ᾄδειν, of the air sungto the accompaniment of instrumental music, Plu. 2.1141a ;κ. ἡ ὑπὸ τὴν ᾠδήν heterophone accompaniment, ib.b.