triplet

noun

1. 1

   A group of three.

2. 2

   One of a group of three.

3. 3

   One of a group of three siblings born at the same time to the same mother.

4. 4

   A group of three notes played or written where two notes would ordinarily be; a form of tuplet.

5. 5

   A triquark.

6. 6

   A quantum state with three allowed projections for the spin.

7. 7

   A constructed gem consisting of a thin slice of natural opal sandwiched between a clear glass or quartz top and a synthetic or stone backing that enhances the colour of the opal.