A haemophiliac is a person who has a bleeding disorder, which means that their BLOOD does not clot properly. This can lead to excessive and prolonged bleeding from even minor cuts or injuries. The term 'haemophiliac' is derived from the Greek words for 'BLOOD' and 'LOVE', and the medical term for this condition is haemophilia. The crossword solution 'bleeder' is an informal term used to describe someone with haemophilia, as they are prone to bleeding.