igni - infr
- in flight telemetry calibration
- in gate
- in line
- in line engine
- in line fuel injection pump
- in line piston hydraulic pump
- in orbit assembly
- in orbit checkout
- in orbit configuration
- in orbit weight
- in phase signal
- in plane direction
- in service environment
- in service time
- in silo launch capability
- in space configuration
- in space maintenance
- in space test facility
- in transit payload
- inability
- inaccessibility
- inaccuracy
- inaccurate
- inaccurate centring
- inactive trajectory leg
- inadvertent ignition
- inappropriate timing
- inboard engine
- inboard flap attachment mechanism
- inboard motor
- inboard power plant
- inboard tank
- inbound template
- inbuilt jack
- incandescent exhaust efflux
- incapacitation effect
- incendiary
- incendiary agent
- incendiary ammunition
- incendiary bomb
