Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Medical Dictionary

factor V

play
noun \-ˈfīv\

Medical Definition of factor V

  1. :  a globulin clotting factor produced primarily in the liver that circulates in an inactive form in blood plasma and in its activated form combines with factor X on the surface of platelets to accelerate the conversion of prothrombin to thrombin—called also , ,




Seen and Heard

What made you want to look up factor V? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

immature or lacking adult sophistication

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image567572573

Which of these is a synonym of unctuous?

prompt oily maudlin angry
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ