Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† 1. aulus, i, m., = αὐλός (flute), a fluteshaped kind of scollop, Plin. 32, 9, 32, § 103.
2. Aulus, i, m., a Roman prœnomen, usu. abbrev. to A.; e. g. A. Albinus, A. Cluentius Avitus, etc.