τό,= ῥάχις, Hsch.; acc. to Phot.
A the beginning of the spine, acc. to Poll.2.136 the middle; = πλευρόν, Did. ap. Phot. II butcher's knife or chopper, Poll.7.25; Hsch. cites βράκετον (leg. -τρον) = δρέπανον.