single-head
single-heterojunction
single-hetero-structure
single-heterostructure
single-hole
single-hop
single-housing
single-impeller
single-impulse
single-ion
  single-jersey
single-jet
single-key
single-keystroke
single-knit
single-lane
single-lap
single-layer
single-layer-coated
single-leaf
single-lens