† 1.  [SUB- 10.] An eighth part. Obs. rare.

1

1705.  Arbuthnot, Coins, etc. (1727), 81. Our Gallon, which … has the Pint for its Suboctave.

2

  2.  Mus. [SUB- 4 (b).] The octave below a given note. Also attrib. in suboctave coupler.

3

1659.  C. Simpson, Division-Violist, I. 7. With the Lowest String put down a Note, to make it a Sub-Octave thereunto.

4

1876.  Stainer & Barrett, Dict. Mus. Terms, Suboctave, a coupler in the organ which pulls down keys one octave below those which are struck.

5

1884.  Encycl. Brit., XVII. 834/2. The choir to great sub-octave coupler was used chiefly as a substitute for a double on the great organ.

6