From Wiktionary, the free dictionary
From pre- + operation.
preoperation (not comparable)
- Prior to an operation (military, surgical, or other).
2007 October 3, Nina Bernstein, “Raids Were a Shambles, Nassau Complains to U.S.”, in New York Times[1]:They also broke promises to share a list of targets, and failed to attend a preoperation briefing, he added.
