- tetraethylplumbate (TEL)
- tetrafluoroborate
- tetrafluoroethylene
- tetrafluoroethylene-ethylene copolymers
- tetragamma-function
- tetragon
- tetragonal
- tetragonal bisphenoid
- tetragonal crystal system
- tetragonality
- tetragonal number
- tetragonal system
- tetragonometry
- tetragontrioctahedron
- tetragram
- tetra-halogen
- tetrahedral
- tetrahedral angle
- tetrahedral apparatus
- tetrahedral bond
- tetrahedral carbon
- tetrahedral complex
- tetrahedral configuration
- tetrahedral coordinate
- tetrahedral equation