ἄρβηλος,ὁ(Sch. Nic. l.c.),
A. semicircular knife,used by cobblers, i.e. leather-workers ( ἄρβηλοι γὰρ τὰ δέρματα
Hsch.
s.v. ἀνάρβηλα ), Nic. Th. 423 .
II. Geom.,figure resembling it in shape,contained by three semicircles with coincident diameters <*>, Papp. 208.12 .