1. Concave on one side and convex on the other with the concavity being greater than the convexity

See also: concave

• Sphingidae
• sphingine
• sphinx
• sphinx moth
• sphragistics
• sphygmograph
• sphygmomanometer
• Sphyraena
• Sphyraena barracuda
• Sphyraenidae
• Sphyrapicus
• Sphyrapicus varius
• Sphyrapicus varius ruber
• Sphyrna
• Sphyrna tiburo
• Sphyrna tudes
• Sphyrna zygaena
• Sphyrnidae
• spic
• spic-and-span
• spica
• spicate
• spiccato
• spiccato bowing
• spice