Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† phlegmŏnē, ēs, f., = φλεγμονή, and phlegmōn, ŏnis, m., = φλεγμων, a burning heat or inflammation beneath the skin, Plin. 20, 4, 13, § 24.