What is "gritrock"

Grit \Grit\, n. [OE, greet, greot, sand, gravel, AS. gre['o]t grit, sant, dust; akin to OS griott, OFries. gret gravel, OHG. grioz, G. griess, Icel. grj[=o]t, and to E. groats, grout. See Groats, Grout, and cf. Grail gravel.]

1. Sand or gravel; rough, hard particles.

2. The coarse part of meal.

3. pl. Grain, esp. oats or wheat, hulled and coarsely ground; in high milling, fragments of cracked wheat smaller than groats.

4. (Geol.) A hard, coarse-grained siliceous sandstone; as, millstone grit; -- called also gritrock and gritstone. The name is also applied to a finer sharp-grained sandstone; as, grindstone grit.

5. Structure, as adapted to grind or sharpen; as, a hone of good grit.

6. Firmness of mind; invincible spirit; unyielding courage; fortitude.
   --C. Reade.
   --E. P. Whipple.

n. gritstone

n. a hard coarse-grained siliceous sandstone [syn: grit, gritstone]