In English, we call those charming little slimy gastropods "snails." The etymology is offensively dull. Via etymonline:
The Romans were more observant. They called a snail a coclea, identical to their word for "spiral screw." And with their observation, the Greek tradition mixed in creativity, establishing my personal favorite (via LSJ): φέροικος--literally, house-bearer.
snail O.E. snægl, from P.Gmc. *snagilas (cf. O.S. snegil, O.N. snigill, M.H.G. snegel, dial. Ger. Schnegel, O.H.G. snecko, Ger. Schnecke "snail"), from base *snag-, *sneg- "to crawl" (see snake). The word essentially is a dim. form of O.E. snaca "snake," lit. "creeping thing." Also formerly used of slugs. Symbolic of slowness since at least c.1000;snail's pace is attested from c.1400.