- heterogeneous
- heteropolar generator
- HF transistor
- hidden surface
- Hermitian operator
- Hertz vector
- heterochromatic
- heterochromatic photometry
- heterodyne receiver
- heterogeneous light
- heteromorphic transformation
- heteropolar machine
- hexagonal system
- hi pot
- high-frequency
- high-persistence
- high-pitched
- higher harmonic
- hill
- Histogram
- hoar frost
- hoarfrost
- Hochstadter cable
- Hodge theorem
- holding conditions
- Higgs mechanism
- high performance
- high Q
- Hilbert space
- hiss
- holding cooler
- holdover
- holdover capacity
- holdover cooling
- hole density
- hole mobility
- hollow coil
- high-definition
- highlight
- hodograph
- holding current
- holding load
- holding shrink
- holding time
- holding voltage
- holdover battery
- holdover plate
- hole conduction
- holmium
- hologram
- holographic memories
- holography
- holographic image
- home
- homocentric ray
- homofocal
- homogeneous radiation
- homology
- homomorphism
- hook transistor
- Hopkinson effect
- horizontal range
- hot electron
- hot gas
- holohedral
- holomic system
- homeopolar
- homing relay
- homochromatic
- homogeneity
- homogeneous
- homogeneous distribution
- homogeneous mixture
- homogeneous temperature
- homogenize
- honeycomb absorber
- honeycomb coil
- honeycomb structure
- horizontal compressor
- horizontal deflection
- hot blast
- high tension
- holographic technique
- holohedral form
- holonomic constraint
- Holtz machine
- home meter
- homeopolarity
- homogeneous field
- homonuclear
- homopolar component
- homotopy
- hookean
- hookup
- hopkinson tariff
- horizontal buoyancy
- horn gap
- host
- hot electrode
- hot line