[1] : WordNet (r) 2.0

amino acid
     n : organic compounds containing an amino group and a carboxylic
         acid group; "proteins are composed of various proportions
         of about 20 common amino acids" syn: aminoalkanoic acid
see also:
aminoalkanoic acid 

[2] : Moby Thesaurus II by Grady Ward, 1.0

22 moby thesaurus words for "amino acid":
   alanine, albuminoid, arginine, chromoprotein, dipeptide, glycine,
   glycoprotein, leucine, lipoprotein, lysine, methionine,
   nucleoprotein, peptide, phenylalanine, phosphoprotein, proteid,
   protein, protide, sarcosine, serine, threonine, valine

Amino Acid >> A Words
Amino Acid, definition of term: Amino Acid
amino+acid_pag1.html

Acid >> A Words
Acid, definition of term: Acid
acid_pag1.html

Amino >> A Words
Amino, definition of term: Amino
amino_pag1.html

Acid Test >> A Words
Acid Test, definition of term: Acid Test
acid+test_pag1.html

Acid Rain >> A Words
Acid Rain, definition of term: Acid Rain
acid+rain_pag1.html

Ascorbic Acid >> A Words
Ascorbic Acid, definition of term: Ascorbic Acid
ascorbic+acid_pag1.html

Aspartic Acid >> A Words
Aspartic Acid, definition of term: Aspartic Acid
aspartic+acid_pag1.html

Amido Acid >> A Words
Amido Acid, definition of term: Amido Acid
amido+acid_pag1.html

Acetic Acid >> A Words
Acetic Acid, definition of term: Acetic Acid
acetic+acid_pag1.html

Arsenious Acid >> A Words
Arsenious Acid, definition of term: Arsenious Acid
arsenious+acid_pag1.html