This word is acceptable for play in the UK dictionary that is being used in the following games:

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n. The transportation of a wounded person, usually by air, from an area of military conflict to an area where medical care can be provided.

v. To transport (a wounded person) from an area of military conflict to an area where medical care can be provided.

n. Alternative form of CASEVAC.

v. To perform the emergency evacuation of an injured person or people (civilians or soldiers) from a combat zone.

"He should have had available to him a dedicated "casevac" casualty evacuation medium-lift helicopter covered by the firepower of all three gunships."