noun

• the foot of a human
• the hoof of a quadruped
• clubfoot or talipes
• (music) a neume representing two notes ascending
• (organic chemistry) polyester
• (electronics) Initialism of IEEE Power Engineering Society.
• (video games) Initialism of Pro Evolution Soccer.
• (organic chemistry) Abbreviation of polyethersulfone. [(chemistry) Any of a family of thermoplastic polymers that are known for their toughness and stability at high temperatures. They contain the subunit aryl-SO₂-aryl, the defining feature of which is the sulfone group.]
• (physics) Initialism of potential energy surface.
• Initialism of phantom eye syndrome. [phantom pain and visual hallucinations after the removal of an eye]
• Abbreviation of polyester. [Any polymer whose monomers are linked together by ester bonds]