lithic

adj

1. Relating to stone.

   “lithic architecture”

2. Relating to rock.
3. Relating to lithium.
4. Relating to the formation of uric acid concretions (stones) in the bladder and other parts of the body.

   “lithic diathesis”

5. (capitalized, often)pertaining to Native American culture before circa 8,500 BCE.

noun

1. A stone tool or projectile.
2. A medicine that prevents stone in the bladder.
3. A lithic fragment: a piece of another rock eroded down to sand size.

   “Silty fine sandstone: poorly sorted; 50% quartz, 30% fossils, 10% lithics, 10% feldspar”