Math: the systematic treatment of magnitude, relationships between figures and forms, and relations between quantities expressed symbolically.
Also, mathematical procedures, operations, or properties.
Dictionary : Letter O
Obelus
Oblique
Oblique Cone
Oblique Cylinder
Oblique Prism
Oblique Pyramid
Oblong
Obtuse Angle
Obtuse Triangle
Octagon
Octahedron
Octal
Odd Number
Odds
Odometer
One Dimensional
Open Curve
Open Interval
Open Sentence
Operation
Operator
Opportunity Cost
Opposite Numbers
Opposite Side
Or
Order Of Magnitude
Order of Operations
Ordered Pair
Ordering
Ordinal Number
Ordinary Differential Equation
Ordinate
Origin
Origin Symmetry
Orthocenter
Orthogonal
Oscillating Series
Ounce
Outcome
Outlier
Oval
Ovoid
