Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
2. histŏrĭcē, ēs, f., = ἱστορική, explanation, interpretation of an author: finitae quidem sunt partes duae, quas haec professio pollicetur, id est ratio loquendi et enarratio auctorum: quarum illam methodicen, hanc historicen vocant, Quint. 1, 9, 1.