irregular outer edge

leading edge (LE) / leading-edge

leading-edge sweep / leading edge sweep

irregular

irregular enemy

irregular forces

irregular terrain

irregular troops

irregular warfare

irregular ignition

outer bottom

outer case

outer garment

outer hull

outer surfaces

axle outer bearing

outer aileron

bearing outer race

outer window pane

outer wing

outer locator with marker (OLM)

outer marker (OM)

locator outer marker

outer locator

outer marker

outer marker radio beacon

outer gimbal

outer gimbal axis

outer gimbal ring

inner loop / outer loop

deck-edge elevator

forward edge of the battle area (FEBA)

knife-edge around