ἀκρόπλοος

A. swimming at the top, skimming the surface, φλέβια Hp. Morb. 1.14, cf. Plu. 2.591e; buoyant, ὑστέρη Aret. SA 2.11; restored for ἀκρόπαθος in Hp. Prorrh. 2.11:—superficial, Id. Ep. 18 (Democr.).