Noun
a coagulation factor (trade name Hemofil) whose absence is associated with hemophilia A
Source: WordNetTwice a week I would receive injections or IV's of Factor VIII which clotted the blood and then broke it down. Ryan White
“The statistics say it all – 59 haemophiliacs were infected with HIV in Scotland, as opposed to 1,243 in England, where a high proportion of HIV-infected Factor VIII from the US was used. Source: Internet