platelet-activating factor

noun
plate·​let-ac·​ti·​vat·​ing factor | \ -ˌak-tə-ˌvāt-iŋ- How to pronounce platelet-activating factor (audio) \

Medical Definition of platelet-activating factor

: phospholipid that is produced especially by mast cells and basophils, causes the aggregation of blood platelets and the release of blood-platelet substances (as histamine or serotonin), and is a mediator of inflammation (as in asthma) abbreviation PAF

Learn More about platelet-activating factor

Share platelet-activating factor

Resources for platelet-activating factor

Comments on platelet-activating factor

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

WORD OF THE DAY

to boil down or concentrate

Get Word of the Day daily email!

Test Your Vocabulary

Original Meanings Quiz

  • rembrandt-painting-a-young-scholar-and-his-tutor
  • Which of the following is the earliest known sense of the word awe?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Dictionary Devil

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

TAKE THE QUIZ

Love words? Need even more definitions?

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