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"
a lump or mass of hard consolidated mineral matter; "he threw a rock at me"
(figurative) someone who is strong and stable and dependable; "he was her rock during the crisis"; "Thou art Peter, and upon this rock I will build my church"--Gospel According to Matthew
United States gynecologist and devout Catholic who conducted the first clinical trials of the oral contraceptive pill (1890-1984)
material consisting of the aggregate of minerals like those making up the Earth's crust; "that mountain is solid rock"; "stone is abundant in New England and there are many quarries"
move back and forth or sideways; "the ship was rocking"; "the tall building swayed"; "She rocked back and forth on her feet"
cause to move back and forth; "rock the cradle"; "rock the baby"; "the wind swayed the trees gently"
(genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as well as introns between the exons; it is considered a unit of heredity; "genes were formerly called factors"
any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter