suboctave /sub-okˈtiv/

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

• foster
• fosterage
• fosterages
• foster-brother
• foster-brothers
• foster-child
• foster-children
• foster-daughter
• foster-daughters
• fostered
• fosterer
• fosterers
• foster-father
• foster-fathers
• foster-home
• foster-homes
• fostering
• fosterings
• fosterling
• fosterlings
• foster-mother
• foster-mothers
• foster-nurse
• foster-nurses
• foster-parent