heli - homo
- helical
- helical antenna
- helical antenna array
- helical beam antenna
- helical chaos
- helical delay line
- helical dipole
- helical dislocation
- helical editing
- helical field
- helical flashlamp
- helical gas lens
- helical instability
- helical line isolator
- helical neutral point
- helical null point
- helical postdeflection accelerator
- helical potentiometer
- helical recording
- helical resonator
- helical scan
- helical scan recording
- helical scanning
- helical servo
- helical spiral
- helical tape
- helical video tape recorder
- helical videotape
- helical waveguide
- helically rotating plasma
- helicity
- helicoid
- helicoidal
- helicon
- helicon frequency
- helicon oscillation
- helicone
- helicopter
- helicopter repeater
- helimagnet
