"Tetrahedral" is a word in ENGLISH
Having, or composed of, four sides.
Having the form of the regular tetrahedron.
Pertaining or related to a tetrahedron, or to the
system of hemihedral forms to which the tetrahedron belongs.
Darkness does not exist at all. It is merely the absence of light but it is essential for being there even if it isn't there at all given that it takes a certain amount of darkness to allow one in understanding light. How would have one understood light, or say, differentiated light from light, if it were not for the absence of light- darkness- to allow such a generous sympathy?
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What do you call a pen with no hair ?A bald point !
A solid related to a tetrahedron, and contained under twelve equal triangles.
Read the complete definitionA solid bounded by twelve quadrilateral faces. It is a hemihedral form of the isometric system, allied to the tetrahedron.
Read the complete definitionHaving half of the similar parts of a crystals, instead of all; consisting of half the planes which full symmetry …
Read the complete definitionA solid hemihedrally derived. The tetrahedron is a hemihedron.
Read the complete definitionA solid figure inclosed or bounded by four triangles.
Read the complete definition