A stool
A tripod.
A 4 legged animal with a cut of leg
a ten legged crab is called a decacrab
Three legged stands are often called stools. In photography a three legged stand is called a tripod.
The person who steers the boat is called a cox, the person who sets the pace is called stroke, then the person behind is called 3 seat, the person behind 3 seat is called 2 seat and then at the back is bow.
You don't.
Draggs!
20 of the 3 legged stools and 11 of the 4 legged chairs
A small seat that has three legs as opposed to four (or more)
1935 has a reverse double die variety but no known 3-legged reverses.Only 1936d & 1937d coins have 3-legged types
millipede
A Weenis
Terrapods