Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pluscŭlus, a, um, adj. dim. [plus], somewhat more, a little more; rather many (only as subst. class.): tum pluscula Supellectile opus est, Ter. Phorm. 4, 3, 60: sal, Col. 12, 50, 12: ad cujus noctis exemplar similes adstruximus plusculas, several nights, App. M. 2, p. 122, 25: pyxides, id. ib. 3, p. 138, 25.
Neutr. subst., a somewhat larger amount: plusculum etiam, quam concedit veritas, amori nostro largiare, Cic. Fam. 5, 12, 3.
With gen.: plusculum negotii, Cic. de Or. 2, 24: ut plusculum sibi juris populus ascisceret, id. Rep. 2, 33, 57.