snail -
A spiralcam, 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.
snail -
A tortoise or testudo; a movable roof or shed to protect besiegers.
Snail is a common name for almost all members of the molluscan class Gastropoda that have coiled shells in the adult stage. When the word is used in a general sense, it includes sea snails, land snails and freshwater snails. Otherwise snail-like creatures that lack a shell (or have only a very small one) are called slugs.
OmegaWiki Dictionary
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snail (Gastropoda) Ventral footed mollusk, including land snails, terrestrial pulmonate gastropod mollusks.
