The Collaborative International Dictionary of English v.0.48:

Limax \Li"max\ (l[imac]"m[a^]ks), n. [L.] (Zool.)
   A genus of airbreathing mollusks, including the common garden
   slugs. They have a small rudimentary shell. The breathing
   pore is on the right side of the neck. Several species are
   troublesome in gardens. See Slug.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Limax
    n 1: a genus of Limacidae [syn: Limax, genus Limax]