Longman Dictionary of Contemporary English homepage

Date: 1800-1900
Language: French
Origin: protéine, from Greek protos 'first'

protein

 noun
     
Related topics: Nutrition, Biology
pro‧tein W2 [uncountable and countable]
DFN one of several natural substances that exist in food such as meat, eggs, and beans, and which your body needs in order to grow and remain strong and healthy
Definition from the Longman Dictionary of Contemporary English
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