Meaning

noun large voracious aquatic reptile having a long snout with massive jaws and sharp teeth and a body covered with bony plates; of sluggish tropical waters

originInherited from Middle English cocodrill, cokadrill, cokedril, from Old French cocodril (modern French crocodile), from Medieval Latin cocodrillus, from Latin crocodilus, from Ancient Greek κροκόδειλος (krokódeilos). The word was later refashioned after the Latin and Greek forms. Doublet of krokodil.

Etymology from Wiktionary, CC BY-SA 3.0