n. [ From Granule. ] (Geol.) A whitish, granular rock, consisting of feldspar and quartz intimately mixed; -- sometimes called whitestone, and leptynite. [ 1913 Webster ]
n. [ From Granule. ] (Geol.) A whitish, granular rock, consisting of feldspar and quartz intimately mixed; -- sometimes called whitestone, and leptynite. [ 1913 Webster ]