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

• unserviceable
• unservile
• unset
• unsettle
• unsettled
• unsettlement
• unsex
• unsexed
• unsexy
• unshackle
• unshackled
• unshaded
• unshadowed
• unshakable
• unshakably
• unshakeable
• unshaken
• unshaped
• unshapely
• unshapen
• unshared
• unsharpened
• unshaved
• unshaven
• unsheared