backblast area

backblast area

[′bak‚blast ′er·ē·ə]
(ordnance)
Cone-shaped area to the rear of a recoilless weapon, rocket launcher, or rocket-assisted takeoff unit which is dangerous to personnel because of the expulsion of powder gases.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.