Hematoidin :: Hematoidin (n.) A crystalline or amorphous pigment, free from iron, formed from hematin in old blood stains, and in old hemorrhages in the body. It resembles bilirubin. When present in the corpora lutea it is called haemolutein..
Hematology :: Hematology (n.) The science which treats of the blood.
Hematoma :: Hematoma (n.) A circumscribed swelling produced by an effusion of blood beneath the skin.
Hematophilia :: Hematophilia (n.) A condition characterized by a tendency to profuse and uncontrollable hemorrhage from the slightest wounds.