Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Tĭgellīnus (Tĭgil-), i, m.; in full: Tofonius Tigellinus, a favorite of Nero, Tac. A. 14, 48 sqq.; 14, 57; 15, 50; 16, 17; Suet. Galb. 15; Juv. 1, 155; he committed suicide, Tac. H. 1, 72.