The Collaborative International Dictionary of English v.0.48:

Canella \Ca*nel"la\ (k[.a]*n[e^]l"l[.a]), n. [LL. (OE. canel,
   canelle, cinnamon, fr. F. cannelle), Dim. of L. canna a reed.
   Canella is so called from the shape of the rolls of prepared
   bark. See Cane.] (Bot.)
   A genus of trees of the order Canellace[ae], growing in the
   West Indies.
   [1913 Webster]

   Note: The principal species is Canella alba, and its bark
         is a spice and drug exported under the names of wild
         cinnamon and whitewood bark.
         [1913 Webster]

WordNet (r) 3.0 (2006):

canella
    n 1: highly aromatic inner bark of the Canella winterana used as
         a condiment and a tonic [syn: canella, canella bark,
         white cinnamon]