suboctave /sub-okˈtiv/

1. The octave below
2. (also suboctave coupler) an organ coupler that gives an octave below

• extrapolation
• extrapolations
• extrapolative
• extrapolator
• extrapolators
• extrapolatory
• extrapose
• extraposed
• extraposes
• extraposing
• extraposition
• extrapositions
• extra-professional
• extra-provincial
• extra-regular
• extras
• extrasensory
• extrasensory perception
• extra-solar
• extra-special
• extra-specials
• extraterrestrial
• extraterritorial
• extraterritoriality
• extra time