noun
hemocyanin
A copper-containing respiratory protein found in the blood of some mollusks and arthropods, analogous to hemoglobin in vertebrates.
イカの血液にはヘモシアニンが含まれている。
Squid blood contains hemocyanin.
Borrowed from English 'hemocyanin', which derives from 'hemo-' (blood) and 'cyanin' (blue), referring to the blue color of the oxygenated protein.