Webster's English Dictionary

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lobster

lob.ster \'la:b-st*r\ n [ME, fr. OE loppestre, fr. loppe spider; akin to ME 
   sloberen]to slobber 1a: a large marine decapod crustacean (family 
   Homaridae) commonly used for  food; esp : one of a genus (Homarus) 
   including the American lobster (H. americanus) and the European lobster (H. 
   vulgaris) of the Atlantic coasts and the very small Cape lobster (H. 
   capensis) of southern Africa 1b: SPINY LOBSTER  2: a stupid or awkward 
   person : LUMMOX