Definition of factor VIII noun from the Oxford Advanced Learner's Dictionary

 

factor VIII

 noun
(also factor 8, factor eight)noun
BrE BrE//ˌfæktər ˈeɪt//
 
; NAmE NAmE//ˌfæktər ˈeɪt//
 
[uncountable](biology)
 
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a substance in the blood that helps it to clot (= become thick)
See the Oxford Advanced American Dictionary entry: factor VIII