crassĭtūdo (noun F) : crassus
* Thickness, density.
* Abstr. (in good prose): postes ...Quantā firmitate facti et quantā crassitudine,Plaut. Most. 3, 2, 135: parietum,Caes. B. C. 2, 8: libramentum, in quo nulla omnino crassitudo sit,Cic. Ac. 2, 36, 116: columnarum,Vitr. 4, 4, 2: fornicum,Liv. 44, 11, 5 al.: stipites feminis crassitudine,Caes. B. G. 7, 73; cf. id. ib. 3, 13: aëris,Cic. Div. 1, 42, 93: cerae,Plin. 27, 9, 47, § 71: mellis,id. 28, 12, 50, § 187: (ostrea) crassitudine potius spectanda quam latitudine,id. 32, 6, 21, § 60.
* Concr., a thick matter, dregs, sediment, Cato, R. R. 39, 1; Plin. 25, 11, 90, § 141.

s. TLL