ABCDEFGHIJKLMNOPQRSTUVWXYZ MathematicsDictionary Letter H Browse these definitions or use the Search function above. All HHa ⇒Hi ⇒ Half Halve Handspan Harmonic Mean Hect- Hectagon Hectare (ha) Heft Height Helix Hemisphere Hendecagon Hepta- Heptagon Hexa- Hexadecimal Hexadecimal Number Hexagon Hexahedron Highest Common Factor Hindu-Arabic Number System Histogram Horizontal Horizontal Flip Hour Hour Hand Hundred Hundredth Hyperbola Hyperbolic Functions Hypercube Hypocycloid Hypotenuse Hypothesis Definitions Index