|a relatively mild type of haemophilia, caused by lack of a protein (Christmas factor) implicated in the process of blood clotting|
|[C20: named after S. Christmas, the first patient suffering from the disease who was examined in detail]|
|a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.|
|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|
Christmas disease Christ·mas disease (krĭs'məs)
See hemophilia B.