Liddell–Scott–Jones: ἀκρο-βολισμός

ἀκρο-βολισμός,οῦ,ὁ,= Ἀκροβ<>́λισις, Th. 7.25 , X. HG 1.3.14 , Aen.Tact. 39.6 , etc.;

A. discharge of weapons by light-armed troops, Arr. Tact. 15.4 , 37.1 .