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Webster 1913 Edition
Haemacyanin
Haemˊa-cy′a-nin
(-sī′ȧ-nĭn)
, Noun.
[
Haema-
+ Gr. κύανοσ
a dark blue substance.] (Physiol. Chem.)
A substance found in the blood of the octopus, which gives to it its blue color.
☞ When deprived of oxygen it is colorless, but becomes quickly blue in contact with oxygen, and is then generally called oxyhaemacyanin. A similar blue coloring matter has been detected in small quantity in the blood of other animals and in the bile.