Fraces, fracium, fœm. g. Lies of oile. Plini. Item in amurca & fracibus eæ sunt carnes & inde fæces, Nonnulli flacibus legunt, sed minus placet.
Lewis and Short: Latin dictionary
frăces, um (sing. form FRAX; v. the foll.), m. [kindr. with FRAG, frango; cf. fragosus; lit., broken bits, fragments; hence], grounds or dregs of oil: FRAX trugi/a ga/rou; fraces e)lai/ou trugi/a: u(po/stasis e)lai/ou; fracere e)ci/stasqai; fracidus u(pe/rwros, Gloss. Philox.: oleum quam diutissime in amurca et in fracibus erit, tam deterrimum erit, Cato, R. R. 64 fin.; 66fin.; Col. 6, 13, 3; Plin. 15, 6, 6, 21 sq. al.; Vitr. 7, 1; Grat. Cyneg. 474.