†(a) (of a person) having a delicate or sophisticated sense of taste (obsolete rare); (b) (of a file, saw, comb, or other toothed implement) having…

Designating a half-round file with a pivot at the handle end, used esp. for rounding the teeth of small gearwheels. Obsolete.

Cut across or transversely; having transverse cuts; esp. of a file, having two sets of teeth crossing each other diagonally.

Of very fine size or texture; consisting of especially small particles or slender threads. Of a file or comb: having extremely fine teeth.

of a file = cross-cut, adj. 2.