1. (noun) pigeon that executes backward somersaults in flight or on the ground

• roller
• tumbler pigeon

1. (noun) a gymnast who performs rolls and somersaults and twists etc.

• gymnast

2. (noun) a glass with a flat bottom but no handle or stem; originally had a round bottom

• drinking glass
• glass

3. (noun) a movable obstruction in a lock that must be adjusted to a given position (as by a key) before the bolt can be thrown

• impediment
• impedimenta
• obstructer
• obstruction
• obstructor

4. (noun) pigeon that executes backward somersaults in flight or on the ground

• domestic pigeon

1. (noun) a gymnast who performs rolls and somersaults and twists etc.

• turner

2. (noun) a movable obstruction in a lock that must be adjusted to a given position (as by a key) before the bolt can be thrown

• lever
• lever tumbler
• pin
• pin tumbler

1. (noun) a gymnast who performs rolls and somersaults and twists etc.

• tumble

2. (noun) a movable obstruction in a lock that must be adjusted to a given position (as by a key) before the bolt can be thrown

• tumble

3. (noun) pigeon that executes backward somersaults in flight or on the ground

• tumble