(adj) resembling or containing or abounding in sand; or growing in sandy areas, Syn. sandlike, sandy, Ant. argillaceous, Example:arenaceous limestone; arenaceous grasses
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. [ 1913 Webster ]