1. Flat on one side and concave on the other

See also: concave

• toroidal
• Toronto
• Torontonian
• Torpedinidae
• Torpediniformes
• torpedo
• torpedo boat
• torpedo tube
• torpedo-boat destroyer
• torpid
• torpidity
• torpidly
• torpidness
• torpor
• Torquato Tasso
• torque
• torque converter
• torque wrench
• Torquemada
• torr
• torrefy
• torrent
• torrential
• Torreon
• Torres Strait