snail

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

(by extension) 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.

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

The pod of the snail clover.

To move or travel very slowly.

“The cars were snailing along the motorway during the rush hour.”