Source : Webster's Revised Unabridged Dictionary (1913)

Amaryllis \Am`a*ryl"lis\, n. [L. Amaryllis, Gr. ?, ?, the name
   of a country girl in Theocritus and Virgil.]
   1. A pastoral sweetheart.

            To sport with Amaryllis in the shade. --Milton.

   2. (bot.)
      (a) A family of plants much esteemed for their beauty,
          including the narcissus, jonquil, daffodil, agave, and
          others.
      (b) A genus of the same family, including the Belladonna
          lily.

Source : WordNet®

amaryllis
     n : bulbous plant having showy white to reddish flowers