1. Not capable of physical reflection
   - nonreflective

See also: echoless

• tetragonal
• Tetragonia
• Tetragonia expansa
• Tetragonia tetragonioides
• Tetragoniaceae
• Tetragonurus
• tetragram
• Tetragrammaton
• tetrahalide
• tetrahedral
• tetrahedrite
• tetrahedron
• tetrahydrocannabinol
• tetrahymena
• tetraiodothyronine
• tetralogy
• tetralogy of Fallot
• tetramerous
• tetrameter
• tetramethyldiarsine
• tetrametric
• Tetraneuris
• Tetraneuris acaulis
• Tetraneuris grandiflora
• tetranychid