Illustrated math dictionary

Basic Math Glossary A–Z

More than 900 math terms, explained in plain language, from counting and fractions to algebra, geometry, statistics and calculus. Every term comes with its own drawing, so you can see what a word means as well as read it.

  • 900+terms defined
  • 26letters, A to Z
  • 1drawing for every term

What every entry looks like

run 3rise 2 m = 2/3

Slope

A number that measures the steepness of a line: the rise divided by the run, m = (y₂ − y₁)/(x₂ − x₁).

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More than 900 terms

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B

C

D

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H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

New terms are added regularly. Definitions cover elementary, middle-school and high-school math.

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Basic mathematical symbols

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Important academic words in math

Math constants