Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Chĕlīdon, ŏnis, f., = Χελιδών, a female client of Verres who made him her heir, Cic. Verr. 2, 1, 40, § 104; 2, 1, 52, § 137 sqq.