sub·har·mon·ic 
(sŭb′här-mŏnĭk)
(sŭb′här-mŏnĭk)adj.
Of, relating to, or being a wave with a frequency that is a fraction of a fundamental frequency.
- hairsbreadth
- hair's-breadth
- hair seal
- hair shirt
- hair space
- hairsplitter
- hairsplitting
- hair spray
- hairspray
- hairspring
- hairstreak
- hair stroke
- hairstyle
- hairstyling
- hairstylist
- hairtail
- hair trigger
- hair-trigger
- hair weave
- hairweaving
- hairworm
- hairy
- hairy cell leukemia
- hairy-cell leukemia
- hairy woodpecker