- pertaining to or having the form of a tetrahedron.
- having four lateral planes in addition to the top and bottom.
Origin of tetrahedral
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for tetrahedral
The general form is the Tetrahedral pentagonal dodecahedron (fig. 41).
To the south, 27 E., is a tetrahedral peak, which our guide called Ngoma-dingding.Trans-Himalaya, Vol. 2 (of 2)
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.