Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Ăquilĭus (on coins and in inscrr. Ăquill-; in MSS. Ăquil-), a, um, adj., name of a Roman gens; hence, 
- I.  Subst.: Ăquilĭus, m. 
 
- 1. 
- A.  M. Aquilius Gallus, consul A.U.C. 653, Cic. Ac. 3, 54, 125; id. de Or. 2, 28, 124.
 
- B.  C. Aquilius Gallus, a Roman jurist and orator, Cic. Brut. 42, 154; id. Off. 2, 14, 50.
 
- C.  Aquilius Niger, a Roman historian, Suet. Aug. 11.
 
- 2.  Ăqui-lĭa, f.
 
 - II.  Adj.: Aquilia lex de damno injuriā dato, perh. introduced by the tribune Aquilius Gallus, Cic. Brut. 34, 131.