Crassamentum, ti, n. g. Gellius. Surculi duo erant pari crassamento. Of like thickenesse.
Lewis and Short: Latin dictionary
crassāmentum, i, n. [id.] (post-Aug.), the thickness of an object. I. In gen.: portarum, Plin. 16, 40, 77, 210: surculi, Gell. 17, 9, 7.—II. Esp., the thick sediment of a liquid, the dregs, grounds, Col. 12, 12, 1.