[mod.L., f. L. lactūca lettuce.] The inspissated juice of various kinds of lettuce, used as a drug.
1836. J. M. Gully, Magendie’s Formul. (ed. 2), 165. Dr. Duncan has described the different modes of obtaining lettuce juice, by him called lactucarium.
1876. Harley, Mat. Med. (ed. 6), 541. French lactucarium is formed into circular cakes 11/2 inch in diameter.
