noun

• Any projection or division, especially one of a somewhat rounded form. [from Template:SAFESUBST: c.]
• (anatomy) A clear division of an organ that can be determined at the gross anatomy level, especially one of the parts of the brain, liver or lung. [from Template:SAFESUBST: c.]
• (figure skating) A semicircular pattern left on the ice as the skater travels across it. [from Template:SAFESUBST: c.]