The Collaborative International Dictionary of English v.0.48:

Lucern \Lu"cern\, n. [F. luzerne.] (Bot.)
   A leguminous plant (Medicago sativa), having bluish purple
   cloverlike flowers, cultivated for fodder; -- called also
   alfalfa. [Written also lucerne.]
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The Collaborative International Dictionary of English v.0.48:

Lucern \Lu"cern\, n. [L. lucerna.]
   A lamp. [Obs.] --Lydgate.
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The Collaborative International Dictionary of English v.0.48:

Lucern \Lu"cern\, n. [Etymology uncertain.] [Obs.]
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   1. A sort of hunting dog; -- perhaps from Lucerne, in
      Switzerland.
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            My lucerns, too, or dogs inured to hunt
            Beasts of most rapine.                --Chapman.
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   2. An animal whose fur was formerly much in request (by some
      supposed to be the lynx). [Written also lusern and
      luzern.]
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            The polecat, mastern, and the richskinned lucern
            I know to chase.                      --Beau. & Fl.
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