FACS

Biology. fluorescence-activated cell sorter: a machine that sorts cells according to whether or not they have been tagged with antibodies carrying a fluorescent dye, separating the cells mechanically in a vibrating nozzle, imparting a positive or negative charge to cells that fluoresce, and then passing the cells through an electric field to deflect them into appropriate containers.

Also F.A.C.S. Fellow of the American College of Surgeons.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for facs

This is ‘a fac,’ as Artemus Ward would say, and ‘facs’ are stubborn things.
East Anglia|J. Ewing Ritchie
Aint no use for to try an fool the facs, honeynot one bit of use!
The Ranchman|Charles Alden Seltzer
Face the facs, Martha, face the facs, I tell myselfan I done it.
The Ranchman|Charles Alden Seltzer

Medical definitions for facs

FACS

abbr.

Fellow of the American College of Surgeons