IRU
Appearance
See also: Appendix:Variations of "iru"
English
[edit]![](http://upload.wikimedia.org/wikipedia/commons/thumb/1/12/Peacekeeper_ICBM_Inertial_Measurement_Unit.jpg/220px-Peacekeeper_ICBM_Inertial_Measurement_Unit.jpg)
Noun
[edit]IRU (plural IRUs)
- (aerospace) Initialism of inertial reference unit, a device which uses the forces applied to a spacecraft or aircraft in order to track its orientation.