- half-confocal resonator, hemiconfocal resonator
- half-conformally flat
- half-controlled inverting circuit
- half-cycle
- half-degree
- half density radius
- half-density radius
- half diallel mating design
- half-disk
- half-diving depth
- half-duplex transmission
- half-dyeing time
- half egg enucleation method
- Half Energy Width
- half-exact functor
- half-exact operation
- half-fin anchovy
- Half Flame，Half Brine
- half form bundle
- half-GCD
- half graben
- half graben basin
- half grain leather
- half-group
- half-groupoid