gy·ro·sta·bi·liz·er 
(jī′rō-stābə-lī′zər)
(jī′rō-stābə-lī′zər)n.
An instrument using a gyroscope to automatically counteract unwanted rotary movements such as the rolling of a ship or aircraft.
- three-D
- three-decker
- three-dimensional
- three-gaited
- three-legged race
- Three Mile Island
- three-mile limit
- three-peat
- threepence
- threepenny
- three-piece
- three-ply
- three-point landing
- three-point line
- three-quarter
- three-quarter binding
- three-ring circus
- three R's
- threescore
- three sheets in the wind
- three sheets to/in the wind
- three sheets to the wind
- Three Sisters
- threesome
- three-square