Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† tĕtănĭcus, i, m., = τετανικός, one affected with tetanus (cramp in the neck), Plin. 20, 22, 87, § 239; 26, 12, 81, § 130; 32, 10, 41, § 120.