The Collaborative International Dictionary of English v.0.48:

Taenia \Tae"ni*a\, n.; pl. Taeniae. [L., a ribbon, a
   tapeworm.]
   1. (Zool.) A genus of intestinal worms which includes the
      common tapeworms of man. See Tapeworm.
      [1913 Webster]

   2. (Anat.) A band; a structural line; -- applied to several
      bands and lines of nervous matter in the brain.
      [1913 Webster]

   3. (Arch.) The fillet, or band, at the bottom of a Doric
      frieze, separating it from the architrave.
      [1913 Webster] Taeniacide