Liddell–Scott–Jones: σκῐᾱμᾰχ-ία

σκῐᾱμᾰχ-ία,ἡ,

A. a fighting against a shadow: esp.a form of exercise with hands and feet, Ph. 1.153 .

2. metaph.,fighting with a shadow, mock-fight, 'beating the air', Cic. Fam. 11.14.1 (pl.), Plu. 2.514d , Eust. 663.16 ; title of satire by Varro, Non. p.190 L.—σκιομαχίαis a later form, Gal. 6.146 .