vŏla, ae, f.,
the hollow of the hand , the palm , or (acc. to Fest. p. 370 Müll.), of the foot , the sole , Plin. 11, 45, 105, § 204; Prud. Apoth. 927.—Prov.: nec vola nec vestigium apparet or exstat, i. e. not the slightest trace , Varr. ap. Non. p. 416, 19 and 22.