Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pūpa (puppa), ae, f. [pupus]. 
- I.  A girl, damsel, lass, Mart. 4, 20, 2; Aus. Idyll. 7, 2, 2; Inscr. Orell. 2449.
- II.  Transf., a doll, puppet, Varr. ap. Non. 156, 20; Pers. 2, 70; Hier. Ep. 128, 1; Lact. 2, 4, 12 sq.