The Collaborative International Dictionary of English v.0.48:

Zedoary \Zed"o*a*ry\, n. [F. z['e]doaire, LL. zedoaria; cf. It.
   zedoaria, zettovario, Pg. zedoaria, Sp. zedoaria, cedoaria;
   all fr. Ar. & Per. zedw?r.] (Med.)
   A medicinal substance obtained in the East Indies, having a
   fragrant smell, and a warm, bitter, aromatic taste. It is
   used in medicine as a stimulant.
   [1913 Webster]

   Note: It is the rhizome of different species of Curcuma,
         esp. Curcuma zedoaria, and comes in short, firm
         pieces, externally of a wrinkled gray, ash-colored
         appearance, but within of a brownish red color. There
         are two kinds, round zedoary, and long zedoary.
         [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Curcuma \Cur"cu*ma\ (k?r"k?-m?), n. [Cf. F., It., & Sp. curcuma;
   all fr. Ar. kurkum. Cf. Turmeric.] (Bot.)
   A genus of plants of the order Scitamine[ae], including the
   turmeric plant (Curcuma longa).
   [1913 Webster]

   Curcuma paper. (Chem.) See Turmeric paper, under
      Turmeric.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Curcuma
    n 1: tropical Asiatic perennial herbs [syn: Curcuma, genus
         Curcuma]