tetrachord (tetrakord)

[= F. tétracorde, of the semitone. The Dorian tetrachord had the semi tone at the bottom, the Phrygian in the middle, and the Lydian at the top, thus: Dorian, Phrygian, Lydian, Of these the Dorian was regarded as the chief or standard. Scales were made up by adding tetrachords together. When succe ive tetrachords had a tone in common, they were called conjunct; when they were separated by a Tetra decapod a a number of variously shaped proce es, as a caltrop or sponge-spicule of the tetraxon type. Encyc. Brit., XXII. 417. tetra clad ose (tet-ra-klāʼdōs), a. [ tetra colon (tet-ra-kōʻlon), n.; pl. tetracola (-lä). [LL., Tetra coralla (tetra-kō-ral'ä), n. pl. [NL., Gr. era, four + κοράλλιον, coral. A division of corals, corresponding to the Rugosa. tetra coralline (tet-ra-kor'a-lin), a. [ tetract (tet'rakt), a. [