Medical Dictionary

factor XII

noun \-ˌtwelv\

Definition of FACTOR XII

:  a clotting factor that facilitates blood coagulation in vivo and initiates coagulation on a firm surface (as glass) in vitro but whose deficiency tends not to promote hemorrhage—called also Hageman factor
March 29, 2015
discomfit Hear it
To thwart or disconcert
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears