Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† cynŏcĕphălēa (-līa), ae, f. (cynŏ-cĕphălĭon, ii, n., App. Herb. 87), = κυνοκεφάλαιον, dog’s-head, a magical plant, called also osiritis, Plin. 30, 2, 6, § 18.
† cynŏcĕphălus, i, m., = κυνοκέφαλος.