Found 2 items, similar to Gritstone.
English → English (WordNet) Definition: gritstone gritstone n : a hard coarse-grained siliceous sandstone [syn: grit, gritrock]
English → English (gcide) Definition: Gritstone Gritrock \Grit"rock`\ (gr[i^]t"r[o^]k`), Gritstone \Grit"stone`\ (-st[=o]n`)n. (Geol.) See Grit, n., 4. [1913 Webster]