ἅπαξ (hápaxhap'-axadverbonce)
[Grk] ἅπαξ LN: 60.67, 60.68, 60.70 GK: G562 Hebrew: אֶחָד, פַּעַם
Derivation: probably from ἅπας;
Strong's: one (or a single) time (numerically or conclusively)
KJV: --once.
See: ἅπας