Dictionary.com
definitions

clotting factor

noun

any one of a group of substances, including factor VIII, the presence of which in the blood is essential for blood clotting to occurAlso called: coagulation factor
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
clotting factor in Medicine

clotting factor

[klŏt′ĭng]

n.

Any of various plasma components involved in the clotting of blood, including fibrinogen, prothrombin, thromboplastin, and calcium ion.coagulation factor
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
clotting factor in Science

clotting factor

[klŏt′ĭng]

Any of various components of plasma involved in the coagulation of blood, including fibrinogen, prothrombin, and calcium ions. Hereditary deficiency of clotting factors can cause coagulation disorders such as hemophilia.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.