[syn: Amazon, Amazon River]
4.  mainly green tropical American parrots; 
The Collaborative International Dictionary of English v.0.48:
Amazon \Am"a*zon\, n. [L., fr. Gr. ?.]
   1. One of a fabulous race of female warriors in Scythia;
      hence, a female warrior.
      [1913 Webster]
   2. A tall, strong, masculine woman; a virago.
      [1913 Webster]
   3. (Zool.) A name numerous species of South American parrots
      of the genus Chrysotis
      [1913 Webster]
   Amazon ant (Zool.), a species of ant (Polyergus
      rufescens), of Europe and America. They seize by conquest
      the larv[ae] and nymphs of other species and make slaves
      of them in their own nests.
      [1913 Webster]
WordNet (r) 3.0 (2006):
amazon
    n 1: a large strong and aggressive woman [syn: amazon,
         virago]
    2: (Greek mythology) one of a nation of women warriors of
       Scythia (who burned off the right breast in order to use a
       bow and arrow more effectively)
    3: a major South American river; arises in the Andes and flows
       eastward into the South Atlantic; the world's 2nd longest
       river (4000 miles) [syn: Amazon, Amazon River]
    4: mainly green tropical American parrots
Moby Thesaurus II by Grady Ward, 1.0:
19 Moby Thesaurus words for "amazon":
   Xanthippe, androgyne, butch, colossus, dyke, fishwife, giant,
   harpy, hoyden, lesbian, ogress, romp, scold, shrew, termagant,
   titan, tomboy, virago, vixen