double-bass
1. [ adjective ] pitched an octave below normal bass instrumental or vocal range
Synonyms: contrabass
Examples:

"contrabass or double-bass clarinet"

Related terms: low
Similar spelling:   double_bass
  double_bassoon
  double-bogey
  double-bedded
  double_bar
  double-prop
  double-park
  double_play
  double_over
  double_flat
  double_back
  double-faced
  double_obelisk
  double_first
  double_vision
  double_up