adjective, adverb Informal.
Origin of preop
Examples from the Web for pre-op
Contemporary Examples of pre-op
I am, in fact, typing these words while at the hospital waiting to get my pre-op workup for my second round of surgery.Angelina’s Bold Boob Move
May 14, 2013
My husband, Tony, and I have to be at Massachusetts General Hospital at eight-tomorrow morning for pre-op.Telling My Kids About Cancer
February 8, 2011
1913 as short for pre-operative (preparation).