Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
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.