- inertial motion
- inertial torque
- infrared technology
- infrared-sensitive
- incubator
- index value
- induced emission
- industrial irradiator
- inertia
- inertial confinement
- inertial separator
- infrared filter
- infrared spectroscopy
- ingot mold
- ingot mould
- inherent stability
- inhomogeneous system
- initial criticality
- incidence
- incident particle
- inclined channel
- incoherent sound
- independent control
- indifferent
- induction charging
- industrial isotope
- industrial packaging
- inert
- inertial
- inertial starter
- inertness
- inflate
- infra-red
- infrared emission
- infrared emulsion
- infrared optics
- infrared spectrophotometer
- infrared spectrum
- infrared therapy
- initiating particle
- injection borehole
- inlet muffler
- inner electrons
- instantaneous
- insert earphone
- insulated container
- insulating cork
- insulator
- integral spin
- intense light
- interacting force
- interface
- interfere
- interference
- interference method
- integral element
- intelligibility index
- interatomic bond
- interchangeable
- interferential
- interferometer
- inlet silencer
- insertion gain
- inside welding
- instability phenomena
- instantaneous release
- integrated optics
- intensive quantity
- interaction energy
- interatomic blinding
- interchangeable lens
- intercrystalline
- interference tone
- interferential spectroscope
- interferogram
- interionic
- interlaced scanning
- interlock
- intermediate boson
- intermediate image
- intermittent light
- intermittent noise
- internal capacity
- internal friction
- interval
- intranuclear
- inverse scattering
- interstitial place
- intraatomic
- intramolecular
- intramolecular bond
- inverse-square
- ion
- ion accelerator
- ion cluster
- ion implantation
- ion mobility
- ion yield
- ionic
- ionic atmosphere