a. rare0. [f. L. lactārius LACTARY + -OUS.] LACTARY a.; applied to some of the agarics which yield a milky juice (Mayne, Expos. Lex., 1855). Hence Lactariously adv. (jocular nonce-wd.) on milk diet.
1775. C. Sturges, in J. Grangers Lett. (1805), 167. Her little boy goes on lactariously well.