haematocrystallin

Hemoglobin Hem"o*glo"bin, n. [Hemo- + globe.] (Physiol.) The normal coloring matter of the red blood corpuscles of vertebrate animals. It is composed of hematin and globulin, and is also called {h[ae]matoglobulin}. In arterial blood, it is always combined with oxygen, and is then called {oxyhemoglobin}. It crystallizes under different forms from different animals, and when crystallized, is called {h[ae]matocrystallin}. See {Blood crystal}, under {Blood}. [1913 Webster]