1. [n]  macaws
2. [n]  a constellation in the southern hemisphere near Telescopium and Norma

ARA is a 3 letter word that starts with A.

1. \A"ra\, n. [L.] (Astron.)
   The Altar; a southern constellation, south of the tail of the
   Scorpion.
   
   

2. \A"ra\, n. [Native Indian name.] (Zo["o]l.)
   A name of the great blue and yellow macaw ({Ara ararauna}),
   native of South America.