The Collaborative International Dictionary of English v.0.48:
Clayey \Clay"ey\, a. Consisting of clay; abounding with clay; partaking of clay; like clay. [1913 Webster]WordNet (r) 3.0 (2006):
clayey adj 1: resembling or containing clay; "argillaceous rocks" [syn: argillaceous, clayey] [ant: arenaceous, sandlike, sandy] 2: (used of soil) compact and fine-grained; "the clayey soil was heavy and easily saturated" [syn: clayey, cloggy, heavy]