The Collaborative International Dictionary of English v.0.48:

Lant \Lant\, n. [Cf. Lance.] (Zool.)
   Any one of several species of small, slender, marine fishes
   of the genus Ammedytes. The common European species
   (Ammedytes tobianus) and the American species (Ammedytes
   Americanus) live on sandy shores, buried in the sand, and
   are caught in large quantities for bait. Called also
   launce, and sand eel.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Launce \Launce\, n.
   A lance. [Obs.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Launce \Launce\, n. [It. lance, L. lanx, lancis, plate, scale of
   a balance. Cf. Balance.]
   A balance. [Obs.]
   [1913 Webster]

         Fortune all in equal launce doth sway.   --Spenser.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Launce \Launce\, n. (Zool.)
   See Lant, the fish.
   [1913 Webster]

WordNet (r) 3.0 (2006):

launce
    n 1: very small silvery eellike schooling fishes that burrow
         into sandy beaches [syn: sand lance, sand launce, sand
         eel, launce]