- hysteresis
- hysteresis motor
- hysterocrystallization
- ice basket
- ice bin
- ice blower
- ice box
- ice chip
- ice clew
- ice conveyor
- ice cube
- ice dispenser
- ice film
- ice freezing
- ice gun
- ice house
- ice melting
- ice mound
- ice plug
- ice scraping
- ice supply
- ice tray
- ice vendor
- icehouse
- illuminator
- illuminometer
- image analysis
- image converter
- image error
- image intensifier
- image steadiness
- imaginary component
- immaterial
- immeasurability
- immersion
- immersion thermostat
- immittance
- immunity
- impact grinding
- impedance coupling
- impedance diagram
- impedance magnetometer
- impedance match
- impedance meter
- impeller chamber
- impenetrable
- impervious wall
- implosion physics
- imponderability
- ignitability
- ignition device
- ignition timing
- ignition transformer
- ignitron
- illumination
- illustrative
- image bundle
- image contrast
- image potential
- image-side
- immeasurable
- immediate cooling
- immediate ringing
- immersible pump
- immersion objective
- immittance bridge
- immix
- immobilization
- impact excitation
- impact test
- impassable
- impedance irregularity
- impedance voltage
- imperfect
- imperfect gas
- imperishable
- impermeable
- implosion
- impregnated
- impregnated carbon
- impregnation
- impregnation varnish
- impressed current
- impulse noise
- impulse ratio
- impulse strength
- impulsive noise
- improper
- impulse excitation
- impulse solenoid
- impulse test
- impulser
- impurity semiconductor
- inactivate
- incandescent filament
- inclusion
- incohesion
- incoming call
- incoming gas
- incoming stream