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TAKE THE QUIZ“activating factor”
We have one entry that includes the term activating factor.
platelet-activating factor
noun: 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
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Merriam-Webster unabridged