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

• genus Phthirius
• genus Phthirus
• genus Phthorimaea
• genus Phyllitis
• genus Phyllium
• genus Phyllocladus
• pollute
• polluted
• polluter
• pollution
• Pollux
• polly
• Pollyanna
• pollyannaish
• pollyfish
• pollywog
• polo
• polo ball
• polo mallet
• polo pony
• polo shirt
• polo stick
• polo-neck
• polo-neck collar
• polonaise