snail

Any of very many animals (either hermaphroditic or nonhermaphroditic), of the class Gastropoda, having a coiled shell.

(informal) A slow person; a sluggard.

A spiral cam, or a flat piece of metal of spirally curved outline, used for giving motion to, or changing the position of, another part, as the hammer tail of a striking clock.

(historical) A tortoise or testudo; a movable roof or shed to protect besiegers.

A locomotive with a prime mover but no traction motors, used to provide extra electrical power to another locomotive.

The pod of the snail clover.

To move or travel very slowly.