Source : Webster's Revised Unabridged Dictionary (1913)

Arenaceous \Ar`e*na"ceous\, a. [L. arenaceus, fr. arena sand.]
   Sandy or consisting largely of sand; of the nature of sand;
   easily disintegrating into sand; friable; as, arenaceous
   limestone.

Source : WordNet®

arenaceous
     adj : resembling or containing sand; or growing in sandy areas;
           "arenaceous limestone"; "arenaceous grasses" [syn: {sandy},
            {sandlike}] [ant: {argillaceous}]