Meaning

noun informal terms for money

noun any of various plants of the genus Lactuca

noun leaves of any of various plants of Lactuca sativa

originFrom Middle English letuse, of uncertain precise origin, probably from the plural form Old French laitues, derived from Latin lactūca (“lettuce”), from lac (“milk”), because of the milky fluid in its stalks. Replaced Old English lēahtric. (money): Likely from the green color of US banknotes.

Etymology from Wiktionary, CC BY-SA 3.0