An Etymological Dictionary of the German Language/Lattich
Lattich, m., ‘lettuce,’ from the equiv. MidHG. lattech, latech, lateche, OHG. lattuh (latohha), borrowed in the OHG. period from Lat. lactū̆ca through the intermediate forms lattū̆ca, láttuca; comp. AS. leahtric, ‘lactuca’ (comp. Attich from Lat. acte). — In Huflattich, ‘colt’s foot,’ Lattich represents Lat. lapatium (MidHG. huoflęteche, OHG. huoflętihha), or more correctly MidLat. lapatica (intermediate forms lápatica, láptica, lattica).