- insulating technique
- insulating value
- insulation test
- intake air
- intake losses
- intelligent network
- intensity squeezing
- interacted
- interacting state
- interaction integral
- interactive videography
- interatomic
- interaction factor
- interconnector
- interconvertibility
- intercrystalline
- interface connection
- interfacial tension
- interference phenomena
- intergalactic
- interionic
- interlaminar
- interlock switch
- intermediary liquid
- intermediate coolant
- intermediate cooling
- intermediate isotope
- intermediate mode
- intermediate position
- intermediate state
- intermetallic compounds
- intermittent current
- intermittent noise
- intermittent operation
- intermittent refrigeration
- intermittent scanning
- intermodal dispersion
- intermolecular potential
- internal absorptance
- internal cooling
- internal discharge
- internal grid
- internal impedance
- internal pressure
- internal reflexion
- internal stress
- internal symmetry
- internal transmittance
- internal zoning
- internal zonning
- internally finned
- international volt
- internuclear
- internucleon
- interpenetrate
- interphase
- interphase reactor
- interphasic
- interplanar
- interpolar
- interpole
- interpretation
- interpulse
- interrelation
- interrupt
- interrupted current
- interrupting capacity
- interspace
- interstage cooling
- interstage gas
- interstage pressure
- interstage refrigeration
- interstage temperature
- interturn
- interworking unit
- interzonal
- intimacy
- intolerable
- intra-atomic
- intranuclear
- intrinsic
- intrinsic photoconductivity
- intrinsic property
- intrinsic semiconductor
- intrinsic variable
- intrinsically safe
- inverse process
- inverse transform
- inverted machine
- invisible companion
- invisible radiation
- interstellar dust
- interstitial
- interstitial imperfection
- interstitial position
- intertripping
- intertubular
- intimate
- intracrystalline
- intramolecular