any of a class of nitrogenous organic compounds that have large molecules composed of one or more long chains of amino acids and are an essential part of all living organisms, especially as structural components of body tissues such as muscle, hair, etc., and as enzymes and antibodies

a protein found in wheat

animal proteins

food consisting largely of proteins and making up one of the main nutritional food groups

a diet high in protein

Colorado lamb is world-renowned and an excellent source of protein and key nutrients

research finds that most people eat proteins fairly unevenly throughout the day