factor X

noun

: a clotting factor that is produced primarily in the liver under the influence of vitamin K and in its activated form is a proteolytic enzyme that converts prothrombin to thrombin in a reaction dependent on calcium ions and phospholipids and accelerated by factor V

Examples of factor X in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In Strategy 1, the revealing factor X is 3160/1600 = 1:98. Nicholas Diaco, Scientific American, 20 Mar. 2018

Word History

First Known Use

1954, in the meaning defined above

Time Traveler
The first known use of factor X was in 1954

Dictionary Entries Near factor X

Cite this Entry

“Factor X.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/factor%20X. Accessed 30 Dec. 2024.

Medical Definition

factor X

noun
: a clotting factor that is produced primarily in the liver under the influence of vitamin K and in its activated form is a proteolytic enzyme that converts prothrombin to thrombin in a reaction dependent on calcium ions and phospholipids and accelerated by factor V

called also Stuart-Prower factor

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!