tetrahedral

Historical Examples of tetrahedral

• The general form is the Tetrahedral pentagonal dodecahedron (fig. 41).

  Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7

  Various

• To the south, 27 E., is a tetrahedral peak, which our guide called Ngoma-dingding.

  Trans-Himalaya, Vol. 2 (of 2)

  Sven Hedin

• The tetrahedral form invented by Dr. Graham Bell is unique and interesting.

  Carpentry and Woodwork

  Edwin W. Foster

• The young spores (G, H) are nearly colorless and are tetrahedral (like a three-sided pyramid) in form.

  Elements of Structural and Systematic Botany

  Douglas Houghton Campbell

• Thorax nearly three-sided pyramidal or tetrahedral, with three rounded edges and sub-regular, circular pores.

  Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, Second Part: Subclass Osculosa; Index

  Ernst Haeckel