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Medical Definition of Haemorrhagins
1. A group of toxins found in certain venoms and poisonous material from some plants, e.g., rattlesnake venom and ricin; haemorrhagins cause degeneration and lysis of endothelial cells in capillaries and small vessels, thereby resulting in numerous small haemorrhages in the tissues. Origin: haemorrhage + -in (05 Mar 2000)