• y-Axis
• y-Intercept
• Yacht
• Yanghui Triangle
• Yff Center of Congruence
• Yff Points
• Yff Triangles
• Yin-Yang
• Young Diagram
• Young Girl-Old Woman Illusion
• Young Inequality
• Young's Integral
• Young Tableau

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© 1996-9 Eric W. Weisstein
1999-05-26