Math Words That Start With O: A Quick Reference

In this article, discover a comprehensive list of math words that start with the letter “O” and expand your mathematical vocabulary effortlessly.

  1. Octagon- A polygon with eight sides and eight angles.
  2. Octahedron- A polyhedron with eight faces.
  3. Octal- A base-8 number system.
  4. Ordinate- The y-coordinate in a Cartesian coordinate system.
  5. Origin- The point of intersection of the axes in a coordinate system (0,0).
  6. Odometer- An instrument for measuring distance traveled.
  7. Operation- A mathematical process (e.g., addition, subtraction, multiplication, division).
  8. Ordinal- A number that indicates position or order.
  9. Order of Operations- Rules that define the sequence in which operations should be performed (PEMDAS).
  10. Odds- The ratio of the probability of an event occurring to the probability of it not occurring.
  11. Orthogonal- Perpendicular; at right angles.
  12. Orthocenter- The point where the altitudes of a triangle intersect.
  13. Oblique- Not parallel or perpendicular; slanting.
  14. Oblong- Having an elongated shape.
  15. Oblate- Flattened at the poles (shape of an ellipsoid).
  16. Oblique Angle- An angle that is not a right angle or a multiple of a right angle.
  17. Open Set- A set that does not include its boundary points.
  18. Oscillate- To move or swing back and forth in a regular rhythm.
  19. Oscillation- The act of oscillating; a regular variation in magnitude or position.
  20. One- to-One Correspondence – A situation where each element of one set is paired with a unique element of another set.
  21. Outcome- The result of a probabilistic experiment.
  22. Outlier- A value significantly higher or lower than most of the values in a data set.
  23. Opposite- In a right triangle, the side opposite the angle of interest.
  24. Ordered Pair- A pair of numbers (x, y) that represent a point in a coordinate system.
  25. Optimization- The act of making something as effective or functional as possible.
  26. Orthographic Projection- A method of representing three-dimensional objects in two dimensions.
  27. Overlap- To lie over part of something; to have parts in common.
  28. Omega- The last letter of the Greek alphabet, often used to denote the last or most significant in a series, or the resistance in electrical engineering.
  29. Order- The number of elements in a set or the degree of a polynomial.
  30. Orientation- The relative physical position or direction of something.
  31. Odd Number- An integer that is not divisible by 2.
  32. Obverse- The counterpart of a proposition obtained by negating both the hypothesis and the conclusion.

Enjoy enriching your mathematical vocabulary!

More words: