Lettuce
Middle English: from Old French letues, laitues, plural of laitue, from Latin lactuca, from lac, lact- ‘milk’ (because of its milky juice).
wiktionary
From 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.
etymonline
lettuce (n.)
garden herb extensively cultivated for use as a salad, late 13c., letuse, probably somehow from Old French laitues, plural of laitue "lettuce" (cognate with Spanish lechuga, Italian lattuga), from Latin lactuca "lettuce," from lac (genitive lactis) "milk" (from PIE root *g(a)lag- "milk"); so called for the milky juice of the plant. Old English had borrowed the Latin word as lactuce.
