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