Lewis & Short

scăbo, scābi (no sup.), 3, v. a. [root skap-, skamp; Gr. σκάπτω, to dig; κάπετος, ditch; Lat. scaber, scabies], to scratch, to scrape (syn. rado): caput, Lucil. ap. Non. 472, 6; Hor. S. 1, 10, 71: scaberat ut porcus contritis arbore costis, Lucil. ap. Prisc. p. 884 P.: aures pedibus posterioribus, Plin. 11, 48, 108, § 260: se, id. 8, 27, 41, § 99; 10, 74, 95, § 204: tellurem, id. 10, 71, 91, § 196: laminas (doliorum), id. 18, 26, 64, § 236.
Prov.: mutuum scabere, i. e. to praise one another, Symm. Ep. 1, 31 init.; Ennod. Ep. 1, 10.