πέτρα (pétra|pet'-ra|noun|rock)
[Grk] πέτρα LN: 2.21 GK: G4376 Hebrew: חַלָּמִישׁ‎, כֵּף‎, סֶלַע‎, צוּר‎
Derivation: feminine of the same as Πέτρος;
Strong's: a (mass of) rock (literally or figuratively)
KJV: --rock.
See: Πέτρος