Lewis Short
(adjective) : argillōsus, a, um, id.
* Full of clay, abounding in clay: terra,Varr. R. R. 1, 9, 2; so Plin. 12, 14, 30, § 31, and Vulg. 3 Reg. 7, 46; ib. 2 Par. 4, 17: collis,Col. Arb. 17.
Charlton T. Lewis, Charles Short, A Latin Dictionary