Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† psittăcus, i, m., = ψίττακος, a parrot, Plin. 10, 42, 58, § 117; Pers. prol. 8; Ov. Am. 2, 6, 1; Stat. S. 2, 4, 25; App. Flor. 2, p. 348.