Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. lēnuncŭlus, i, m. dim. [2. leno], a young go-between: aere militari tetigero lenunculum, Plaut. Poen. 5, 5, 7; cf. Prisc. p. 614 P.
2. lēnuncŭlus, i, m. dim. [for lembunculus, from lembus], a small sailingvessel, a bark, skiff: pauci lenunculi conveniebant, Caes. B. C. 2, 43: in lenunculo piscantes, Sall. Fragm. ap. Non. 534, 32: occursu lenunculorum, Tac. A. 14, 5: piscatorius, Amm. 14, 2, 10.