Definition of hemocyanin in English:



(British haemocyanin)
  • A protein containing copper, responsible for transporting oxygen in the blood plasma of arthropods and mollusks.

    ‘It is intriguing that crustaceans seem to express either hemoglobin or hemocyanin but not both proteins.’
    • ‘One grasshopper embryo has a protein that closely resembles hemocyanin in sequence, but no oxygen binding studies to confirm its function have yet been done.’
    • ‘The ontogeny of crustacean hemocyanin, the copper-based oxygen transport protein, has been studied in relatively few species, including Nephrops norvegicus and Homarus americanus.’
    • ‘Injection of bacteria had no influence on hemocyanin or hemolymph protein concentrations when compared to saline injection.’
    • ‘The focus of this paper is on the Crustacea, the class of Arthropoda that expresses both hemoglobin and hemocyanin.’



/ˌhēməˈsīənən/ /ˌhiməˈsaɪənən/


Mid 19th century from hemo-‘of blood’ + cyan+ -in.