adjective, adverb Informal.
Origin of preop
Examples from the Web for 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.
My husband, Tony, and I have to be at Massachusetts General Hospital at eight-tomorrow morning for pre-op.
Word Origin and History for pre-op
1913 as short for pre-operative (preparation).