Trochuses

Example:The parrot turtle uses its trochuses to propel itself through the water.

Definition:A reptile belonging to the order Testudines, characterized by a protective shell and short neck, with four legs and a tail.

Example:The turtle's trochuses act as paddles when it moves through the water.

Definition:A flat implement used for steering and/or moving a boat through the water, or as part of a larger device for similar purposes.

Example:Some mechanical valves rely on parts similar to trochuses to perform rotary motion.

Definition:A device for controlling the passage of liquids or gases, typically by closing off or opening a narrow part of a pipe or passage.