100+ Math Words That Start With E

Greetings, number lovers and equation enthusiasts! Today, we’re embarking on an alphabetical adventure, focusing on the intriguing letter ‘E’. Mathematics, with its vast vocabulary, has offered a plethora of ‘E’ words that play crucial roles in calculations, theorems, and theories. Let’s explore them together!


While ‘E’ might remind many of the exponential constant, there’s a lot more to this letter in the realm of mathematics. Whether you’re a student trying to decipher the language of numbers or a math enthusiast looking for some lexical fun, this list is for you!

Math Words That Start With E Examples

  1. Equation: A statement that asserts the equality of two expressions.
  2. Exponent: A quantity representing the power to which a given number will be raised.
  3. Ellipse: A plane curve such that the sums of the distances of each point in its periphery from two fixed points is constant.
  4. Eigenvalue: A scalar value associated with linear equations that transform vectors.
  5. Eigenvector: A nonzero vector that changes by a scalar factor when a linear transformation is applied.
  6. Euclidean: Relating to the ancient Greek mathematician Euclid.
  7. Extrapolate: To predict by projecting past experience.
  8. Even function: A function that satisfies the condition f(−x) = f(x) for all x in the domain of f.
  9. Element: A component of a mathematical set.
  10. Endomorphism: A transformation from a mathematical set into itself.

Did You Know?:

Euclidean geometry is named after the Greek mathematician Euclid, and it’s what most of us learn in school. But there are also non-Euclidean geometries where parallel lines can meet!

  1. Exterior angle: The angle formed between a side of a polygon and an extended adjacent side.
  2. Euler’s number (e): The base of the natural logarithm, approximately equal to 2.71828.
  3. Eulerian path: A path in a graph which visits every edge exactly once.
  4. Exponential growth: Growth whose rate becomes ever more rapid in proportion to the growing total number or size.
  5. Equilateral: Having all its sides of the same length.
  6. Error: The difference between the actual value and the estimated value.
  7. Elimination method: A method for solving systems of linear equations.
  8. Expected value: The average or mean value of a random variable.
  9. Endpoint: A point at the end of a line segment or the beginning or end of a ray.
  10. Epsilon: A symbol used to represent a small positive quantity in mathematics.

Mathematical Musings:

Remember Euler? Well, he didn’t just give us Euler’s number. He’s also responsible for a multitude of theorems and concepts in mathematics, truly embracing the power of ‘E’!

  1. Enumeration: A complete, ordered listing of all the items in a set.
  2. Equate: To consider or describe as similar or analogous.
  3. Expansion: Expression of something in terms of its components.
  4. Equidistant: Being at the same distance from two or more things.
  5. Excess: The amount of one number or quantity over another.
  6. Euclidean space: A space in which Euclid’s postulates are valid.
  7. Edge: In graph theory, a line that connects two nodes.
  8. Ensemble: A set of statistical data or elements.
  9. Eulerian circuit: A closed walk that includes each edge of a graph once.
  10. Exponential decay: A decrease at a rate proportional to the value of the function.

Exploring Euler Further:

Leonhard Euler was a Swiss mathematician who made numerous discoveries and laid the groundwork for future mathematicians. His work spans from number theory to calculus to topology and more!

  1. Eigenfunction: A function defining the undistorted modes of oscillation of a system.
  2. Equivalence relation: A relation that is reflexive, symmetric, and transitive.
  3. Estimate: To determine roughly the size or value of something.
  4. Euler’s formula: Relates the number of vertices, edges, and faces of a polyhedron.
  5. Echelon form: A matrix form useful for systems of linear equations.
  6. Embedding: Representing a mathematical structure within another.
  7. Enriched category: A category in which the hom-sets have extra structure.
  8. Entire function: A complex function that is holomorphic over the whole complex plane.
  9. Ergodic: A dynamical system which, given enough time, explores all accessible states.
  10. Euclidean algorithm: A method for finding the greatest common divisor of two numbers.

From Real Life to Math:

Ever shopped on a sale and estimated how much you’ll pay? You were using math in real life! Estimations help us make quick decisions without the need for precise calculations.

  1. Exponential function: A function in which an independent variable appears as an exponent.
  2. Eigenstate: A quantum state that is unchanged by a particular observation.
  3. Elliptic: Of or relating to ellipses.
  4. Euclidean division: The process of division of integers that produces a quotient and a remainder.
  5. Elementary function: Functions made up of basic operations, exponentials, logarithms, and nth roots.
  6. Event: An outcome or defined collection of outcomes in probability.
  7. Extrinsic: Not part of the essential nature of someone or something.
  8. Equivalent: Equal in value, measure, force, effect, or significance.
  9. Entropy: Measure of the amount of information that is missing from our knowledge of the complete microstate of the system.
  10. Equinumerosity: A one-to-one correspondence between two sets.

And that’s the halfway mark! From equations to eigenvalues, and exponents to ellipses, the ‘E’ in mathematics is expansive. Stay tuned for the next 50 words as we further explore the essence of ‘E’ in the math world!

  1. Elapse: In the context of time calculations, it refers to the passage of time.
  2. Elongation: The length by which something has been stretched beyond its original state.
  3. Empirical: Based on observation or experience rather than theory or pure logic.
  4. Epicycle: In the Ptolemaic system of astronomy, a small circle whose center moves around the circumference of a larger circle.
  5. Equiprobable: Of events or samples, having the same chance of occurring.
  6. Equate: In algebra, it means to make two expressions equal in value.
  7. Eulerian graph: A graph that possesses an Eulerian circuit.
  8. Equilibrium: A state of balance or a stationary condition.
  9. Equivalence class: A subset of a set partitioned by an equivalence relation.
  10. Envelope: A curve or surface tangent to each of a family of curves or surfaces.

Puzzling Math Moment:

Have you ever tried creating an Eulerian graph? Take a piece of paper and draw dots (vertices). Now, challenge yourself to draw paths (edges) connecting them without retracing any path, and try to return to your starting point. Was it an Eulerian circuit? Fun, right?

  1. Exponential distribution: A probability distribution representing the time between events in a process where events occur continuously at a constant average rate.
  2. Euclidean distance: A measure of the straight-line distance between two points in Euclidean space.
  3. End behavior: A description of the values of a function as the input approaches infinity or negative infinity.
  4. Enumerative combinatorics: The study of counting methods in mathematics.
  5. Epi-: A prefix meaning “above” or “over,” like in epimorphism.
  6. Ergodic theory: A study of the statistical properties of deterministic systems.
  7. Essential singularity: A point in the domain of a function where the function behaves in a particularly “wild” way.
  8. Exterior calculus: Generalization of calculus on manifolds.
  9. Euler’s totient function: An arithmetic function that counts the positive integers up to a given integer n that are relatively prime to n.
  10. Euclidean domain: A ring in which the Euclidean algorithm can be performed.

Engaging With E:

Among all the mathematical terms starting with ‘E’, Euler’s totient function is a fascinating one. It’s like an ancient relic from the times when mathematicians roamed ancient temples, counting primes and crafting theorems in candlelight. Okay, maybe that’s a bit dramatic, but hey, math can inspire stories too!

  1. Eigenbasis: A basis made up of eigenvectors.
  2. Extrinsic geometry: Geometry of a curved surface in relation to the ambient space it’s embedded in.
  3. Edge detection: Identifying points in a digital image where brightness changes sharply, used in image processing.
  4. Extrema: The maximum and minimum values of a function.
  5. Eccentricity: Measure of how much a conic section deviates from being circular.
  6. Evolute: The locus of the centers of curvature of another curve.
  7. Euclidean ring: A commutative ring for which the Euclidean algorithm works.
  8. Exact differential: In calculus, a differential form that is the exterior derivative of another differential form.
  9. Equatorial plane: A plane perpendicular to the rotation axis of a celestial body.
  10. Euler characteristic: A topological invariant representing the number of vertices of a shape minus the number of edges plus the number of faces.
  11. Elementary matrix: A matrix that is derived from the identity matrix by a single elementary row operation.
  12. Exterior derivative: A fundamental differential operator in differential geometry.
  13. Euler’s rotation theorem: States that in three-dimensional space, any displacement of a rigid body such that a point on the rigid body remains fixed, is equivalent to a single rotation about some axis.
  14. Eulerian trail: A trail in a graph which visits every edge once.
  15. Expansion factor: The factor by which a mathematical expression or function is stretched or expanded.
  16. Error propagation: The effect of variables’ uncertainties (or errors) on the uncertainty of a function based on them.
  17. Euclidean norm: The “length” of a vector in Euclidean space, and it can be calculated from the Cartesian coordinates of the vector.
  18. Equivalent fraction: Two fractions that have the same value when simplified.
  19. Ellipsoid: A surface or solid formed by rotating an ellipse about one of its axes.
  20. Epimorphism: A morphism between objects in a category that is “onto”, or “surjective”.
  21. Math Trivia Time!:
  22. Did you know that in the realm of 3D geometry, an ellipsoid looks a lot like a squished or stretched sphere? Picture squeezing a soft ball in your hand – that deformation mirrors how an ellipsoid would look. Such interesting shapes, math has!
  23. Echelon matrix: A matrix that has undergone Gaussian elimination to achieve a particular form for easier solving of systems of equations.
  24. Ennea-: A prefix in geometry representing the number nine, such as enneagon (a polygon with nine sides).
  25. Endofunctor: A functor that maps a category to itself.
  26. Ergodic process: A stochastic process where every orbit is dense in the space.
  27. Equivalence theorem: In linear circuits, it states that two networks are equivalent if they cannot be distinguished from each other by voltage and current measurements.
  28. Extended real number line: Combines the real number line and the points of infinity.
  29. Exclusion principle: In quantum mechanics, two or more identical fermions cannot occupy the same quantum state.
  30. Euler-Lagrange equation: A fundamental equation in the calculus of variations.
  31. Elementary event: In probability, an event with only one outcome.
  32. Euler method: A first-order method for solving ordinary differential equations.


From extrema to evolutes, every term brings a new dimension, a fresh perspective.

Mathematics, with its rich lexicon and deeper concepts, is like a vast ocean waiting to be explored.

As we reach the end of this list, remember that every term, every theorem, and every concept represents a story, a journey, a challenge, and a solution.

From everyday math to the abstract wonders of the universe, the letter ‘E’ encompasses a world of wonder, challenges, and solutions.

Whether you’re a seasoned mathematician or just someone with a budding interest, the rich tapestry of mathematical vocabulary offers something for everyone.

Dive in, explore, and embrace the magic of mathematics. Remember, every equation, every term, and every theorem is a new door waiting to be opened. Happy exploring!

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