noun Any of very many animals (either hermaphroditic or nonhermaphroditic), of the class Gastropoda, having a coiled shell.
noun A slow person; a sluggard.
noun 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.
noun A tortoise or testudo; a movable roof or shed to protect besiegers.
noun The pod of the snail clover.
noun A locomotive with a prime mover but no traction motors, used to provide extra electrical power to another locomotive.
verb To move or travel very slowly.
The cars were snailing along the motorway during the rush hour.