platelet-aggregating factor
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Examples from the Web for paf

  • Yo' wants to go through th' ya'd, to a paf that takes you a spell to a gate.

    The Forest|Stewart Edward White
  • Paff, paf, n. a meaningless word, used with piff to indicate jargon.

  • Carry it in the bosom of your dress, and it is always ready; then if anybody bothers you, out with it, and paf!

    Captain Fracasse|Theophile Gautier
  • You see how it is; this is the only chance I ever had of working out a beautiful case, and, paf!

    File No. 113|Emile Gaboriau