An Etymological Dictionary of Astronomy and Astrophysics

1. A large mass of → stone forming a hill, cliff, promontory, or the like.
   

2. Geology: Mineral matter of variable composition, consolidated or unconsolidated, assembled in masses or considerable quantities in nature, as by the action of heat or water (Dictionary.com).

Etymology (EN): M.E. rokk(e), from O.Fr. ro(c)que, roche (cf. Sp., Provençal roca, It. rocca, M.L. rocca,
V.L. *rocca, of uncertain origin.

Etymology (PE): Bard (Dehxodâ) “rock, stone,” used in a large part of Western Iran, specifically
in Lori and Kurd., related to Kurd. pal “rock, stone;” cf. Gk. poros “rock.”
Sang, → stone.