Lewis & Short

melcŭlum, i, n., and melcŭlus, i, m. dim. [mel; v. melliculus], a term of endearment, = melliculum, Plaut. ap. Prisc. p. 610 P. (where some read melliculum); applied to a male person, in the voc. melcule: vale mel gentium, melcule, ebur ex Etruria, laser Aretinum, etc., Aug. ap. Macr. S. 2, 4 med.
Also, v. l. for melliculum, Plaut. Cas. 4, 4, 16 and 23.