The Collaborative International Dictionary
Achatina
Achatina \Ach`a*ti"na\, n. [NL., from Gr. ? agate.] (Zo["o]l.) A genus of land snails, often large, common in the warm parts of America and Africa.
Wikipedia
Achatina
Achatina is a genus of medium-sized to very large, air-breathing, tropical land snails, terrestrial pulmonate gastropod mollusks in the family Achatinidae.