WordReference Random House Unabridged Dictionary of American English © 2017
  1. Medicine, PathologySee  fetal alcohol syndrome. 
  2. Foreign Agricultural Service.

F.A.S., [Com.]
  1. Business, Naval Termsfree alongside ship: without charge to the buyer for goods delivered alongside ship.
Also,  f.a.s. 
'FAS' also found in these entries:

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