Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Dĭgentĭa, ae, f., a small, clear stream that flowed by Horace’s villa, and fell into the Anio about nine miles above Tibur, near the village of Mandela, now Licenza, Hor. Ep. 1, 18, 104.