argil

from WordNet (r) 3.0 (2006)

argil
    n 1: a white clay (especially a white clay used by potters)

from The Collaborative International Dictionary of English v.0.48

Argil \Ar"gil\, n. [F. argile, L. argilla white clay, akin to
   Gr. ? or ? argil, ? white. See {Argent}.] (Min.)
   Clay, or potter's earth; sometimes pure clay, or alumina. See
   {Clay}.
   [1913 Webster]