Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Ăcūlĕo, ōnis, m., a Roman cognomen in the gens Furia, Liv. 38, 55, 4.
C. Aculeo, a famous lawyer, friend of L. Licinius Crassus, Cic. de Or. 1, 43, 191; 2, 1, 2 al.