'heig'-'homo'
- height equivalent to a theoretical plate
- height equivalent to an effective theoretical plate
- height of observation
- heterochromatic photometry
- heterogeneous membrane electrode
- high reflectivity
- high repetition rate presparking
- high repetition rate sparks
- high-current arc
- high-frequency conductometric end-point
- high-frequency conductometric titration
- high-frequency conductometry
- high-frequency end-point
- high-frequency shorting capacitor
- high-frequency step-up transformer
- high-frequency titration
- high-intensity hollow cathode
- high-level faradaic rectification
- high-pressure arcs
- high-pressure xenon lamp
- high-resolution energy-loss spectroscopy
- high-voltage sparks
- higher harmonic alternating current polarography
- higher harmonic alternating current polarography with phase-sensitive rectification
- Hittorf dark space
- hold-back carrier
- hold-up volume
- hollow cathode discharge
- hollow cathode lamp
- hollow cathode sources
- hollow electrode