protein

nouns

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"
protein
is derived from
proteinaceous
is made of
the flesh of animals (including fishes and birds and snails) used as food
meat
is made of
the seedpod of a leguminous plant (such as peas or beans or lentils)
legume
is made of
oval reproductive body of a fowl (especially a hen) used as food
egg, eggs
is made of
a white nutritious liquid secreted by mammals and used as food by human beings
milk
is a type of (narrower)
any very large complex molecule; found only in plants and animals
macromolecule, supermolecule