For information about the IBâs achievements, initiatives and future strategy, read our annual review. 1  Read about the IB's leading professional development. 2  Read about the IB's support services for schools.
uk â /hem/ us â /hem/. âº the edge of a piece of cloth, such as the bottom edge of a skirt or dress, that is folded over and sewn so that it does not develop loose threads: I took the hem up/let the hem down. Thesaurus: synonyms and related words. Parts of clothes.
Hemophilia (heem-o-FILL-ee-ah) is a rare bleeding disorder in which the blood doesn't clot normally. If you have hemophilia, you may bleed for a longer time than others after an injury. You also may bleed inside your body (internally), especially in your knees, ankles, and elbows.