protein
UK /ˈpɹəʊ.ti.ɪn/ · US /ˈpɹoʊ.tin/ noun
Forms proteins
- noun (biochemistry, countable) Any of numerous large, complex naturally-produced molecules composed of one or more long chains of amino acids, in which the amino acid groups are held together by peptide bonds.
- noun (nutrition, uncountable) One of three major classes of food or source of food energy (4 kcal/gram) abundant in animal-derived foods (meat) and some vegetables, such as legumes.
- noun (nutrition, countable) A food rich in protein, often a meat or meat substitute.
Etymology
From proto- + -ein. Suggested by Jöns Jacob Berzelius in a letter to Gerardus Johannes Mulder, from French protéine and German Protein, both coined based on Ancient Greek πρωτεῖος (prōteîos, “primary”), from πρῶτος (prôtos, “first”).
Webster’s 1913
- noun A body now known as alkali albumin, but originally considered to be the basis of all albuminous substances, whence its name.
Etymology [Gr. prw os first: cf. prwtei^on the first place.]
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “protein”, CC BY-SA 4.0. Details