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hemocyanin

[hee-muh-sahy-uh-nin, hem-uh-]
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noun Biochemistry.
  1. a blue, copper-containing respiratory pigment in the plasma of many invertebrates.
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Origin of hemocyanin

First recorded in 1835–45; hemo- + cyan-1 + -in2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018