Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

Ăcīlĭus, i, m., the name of several Romans, among whom was M’ Acilius Glabrio, trib. pleb., by whom the severe law de pecuniis repetundis was introduced, Cic. Verr. 1, 9 and 17.
C. Acilius Glabrio, the historian, Cic. Off. 3, 32, 115.
Hence, Ăcīlĭus, a, um, adj., Acilian: lex, Cic. Verr. 1, 1.