The Collaborative International Dictionary of English v.0.48:

Lambis \Lambis\ n.
   A genus of scorpion shells of shallow tropical waters of
   eastern hemisphere.

   Syn: genus Lambis.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Lambis
    n 1: scorpion shells of shallow tropical waters of the eastern
         hemisphere [syn: Lambis, genus Lambis]