πέτρα (pétrapet'-ranounrock)
[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