"proteins" in the noun sense
any of a large group of nitrogenous organic compounds that are essential constituents of living cells consist of polymers of amino acids essential in the diet of animals for growth and for repair of tissues can be obtained from meat and eggs and milk and legumes
"a diet high in protein"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License