In surgery, relating to the period preceding an operation.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. happening or done before and in preparation for a surgical operation
Word Usage
"Marijnen CA, van de Velde CJ, Putter H, van den BM, Maas CP, et al. (2005) Impact of short-term preoperative radiotherapy on health-related quality of life and sexual functioning in primary rectal cancer: Report of a multicenter randomized trial."