1. Pertaining or related to a tetrahedron, or to the system of hemihedral forms to which the tetrahedron belongs 
2. Having, or composed of, four sides 
3. Having the form of the regular tetrahedron

Encyclopedia: Tetrahedral

• gratifying
• gratifyingly
• gratin
• grating
• gratingly
• gratis
• gratitude
• gratuitous
• gratuitously
• gratuitousness
• gratuity
• gratulatory
• gravadlax
• gravamen
• grave
• grave accent
• grave mound
• gravedigger
• gravel
• gravel pit
• gravelly
• gravelweed
• gravely
• graven
• graven image