- hitch
- hoist
- hoisting gear
- holding pedestal
- hob
- Holden effect
- holdfast
- hole
- hollow target
- hologram plate
- homogeneous radiation
- hood
- hot chemistry
- hot strength
- hot tear
- hot-drawn
- homogeneous light
- homogeneous stimulus
- homogeneous system
- horizontal component
- horizontal engine
- hot
- hot bonding
- hot cell
- hot creep
- hot laboratory
- hot spot
- hot-draw
- hot-roll
- hotplate
- Huygens" principle
- hydrostatic balance
- hygroscope
- hypercardioid microphone
- hydrodynamic drag
- hydrophone
- hydrostatic equilibrium
- hygrometer
- hypsometer
- ice target
- ignition experiment
- ignition tube
- Huygens" eyepiece
- hydraulic admixture
- hydraulic loss
- hydraulic mining
- hyperon
- hypersonic speed
- idemfactor
- hysteresis
- ice cube
- illuminometer
- imbedding
- immersed
- impact
- impact check
- impact energy
- impenetrable
- impenetrableness
- impinge on
- imponderability
- imponderable
- importance function
- illuminance
- illuminated body
- illuminated dial
- illumination
- imaging system
- immune machines
- impact fracture
- impact parameter
- impact sound
- impart
- impedance transformer
- impenetrability
- impinging particle
- imponderableness
- impoverishment
- improper time
- impulsive noise
- in pipes
- in quadrature
- impulse accelerator
- inactivity
- indeterminacy principle
- indicator diagram
- indicator needle
- induction heating
- induction method
- inductive susceptance
- incandescent solid
- incident
- index table
- indicator tube
- induced drag
- induced radioactivity
- inducing system
- induction force
- inertance
- inertial frame