Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
cēnŭla (caen- or coen-), ae, f. dim. [cena], a little dinner: hesterna, Cic. Tusc. 5, 32, 91: facere cenulas, id. Fam. 9, 24, 2; Suet. Claud. 21: parva, Mart. 5, 78 fin.