ana- prefix oran- Etymology: Medieval Latin, from Latin ana- & Late Latin an-, from Greek ana-, an-, from ana up, on — more at on 1.: up : upward < anode > < Anacardium > 2.: back : backward < ananym > 3.: again : anew < anagenesis > 4.usually ana-, chemistry, usually italic: having substituents in positions 1 and 5 in two fused 6-membered rings (as in naphthalene, quinoline)