Word Summary
aristeros: better, left, on the left
Original Word: ἀριστερός
Transliteration: aristeros
Phonetic Spelling: (ar-is-ter-os')
Part of Speech: Adjective
Short Definition: better, left, on the left
Meaning: better, left, on the left
Strong's Concordance
left hand.

Apparently a comparative of the same as ariston; the left hand (as second-best) -- left (hand).

see GREEK ariston

Thayer's Greek Lexicon
STRONGS NT 710: ἀριστερός

ἀριστερός, ἀριστερά, ἀριστερόν, left: Matthew 6:3; Luke 23:33; (Mark 10:37 T Tr WH, on the plural cf. Winer's Grammar, § 27, 3); ὅπλα ἀριστερά i. e. carried in the left hand, defensive weapons, 2 Corinthians 6:7. (From Homer down.)