hemarthrosis

noun
he·​mar·​thro·​sis
variants: or chiefly British haemarthrosis \ ˌhē-​mär-​ˈthrō-​səs How to pronounce haemarthrosis (audio) , ˌhem-​är-​ How to pronounce haemarthrosis (audio) \
plural hemarthroses\ -​ˌsēz How to pronounce hemarthroses (audio) \

Medical Definition of hemarthrosis

: hemorrhage into a joint