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haemocyanin Line breaks: haemo|cya¦nin
Pronunciation: /ˌhiːmə(ʊ)ˈsʌɪənɪn/
(US hemocyanin)

Definition of haemocyanin in English:


[mass noun] Biochemistry
A protein containing copper, responsible for transporting oxygen in the blood plasma of arthropods and molluscs.
Example sentences
  • 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.


Mid 19th century: from haemo- 'of blood' + cyan + -in1.

Definition of haemocyanin in:
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