|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 chattering or flighty, light-headed person.|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
Christmas disease Christ·mas disease (krĭs'məs)
See hemophilia B.