Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
scŏbis (collat. form scobs, only acc. to Prisc. p. 751 P.; but scobis is found in Cels. 5, 5; 8, 2; Col. 4, 29, 15; 7, 10, 4; cf. scrobis init.), is, f. (m., Vitr. 8, 3; Pall. Febr. 17, 6) [scabo], powder or dust produced by sawing, rasping, etc.; sawdust, scrapings, filings, etc., Cels. 1. 1.; Col. 1. 1.; Hor. S. 2, 4, 81; Plin. 34, 11, 26, § 111; Juv. 14, 67 al.: citreus, i. e. grated lemon-peel, Vitr. 8, 3, 8: cutis, scurf, etc., Plin. 30, 4, 10, § 28.