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

prothrombin

play
noun pro·throm·bin \(ˌ)prō-ˈthräm-bən\

Definition of prothrombin

  1. :  a plasma protein produced in the liver in the presence of vitamin K and converted into thrombin in the clotting of blood



Origin of prothrombin

International Scientific Vocabulary


First Known Use: 1898


Medical Dictionary

prothrombin

play
noun pro·throm·bin \(ˈ)prō-ˈthräm-bən\

Medical Definition of prothrombin

  1. :  a plasma protein produced in the liver in the presence of vitamin K and converted into thrombin by the action of various activators (as thromboplastin) in the clotting of blood

  2. pro·throm·bic \-bik\play adjective




Learn More about prothrombin


Seen and Heard

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

WORD OF THE DAY

February 11, 2016

the holder of an office

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image33683556

How much does a batman (the Turkish unit of measurement) weigh?

2.2 pounds 16.96 pounds 100 pounds 196.5 pounds
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ