This page links to several useful dictionaries and other reference material for Mathematics students and teachers.

For definitions, try Jenny Eather’s dictionary

Note too, the section on charts. Also very useful is this glossary for teachers. It’s really good for students too as it defines vocabulary used in Mathematics from Key Stage 1 to Key Stage 4 (Ages 6-16). Note the KS1 – KS3 new edition from NCETM.  For the terminology used in question papers see this document: maths exam terminology (I have seen this document around the web, I believe the original is from AQA).

Check mathematical formulae from Loughborough University. This is also available as a free app for mobile phones.

Try Wolfram MathWorld. Note that that is possible to obtain a definition from WolframAlpha – for example try complex number for various examples with complex numbers and note that you can choose to look at the mathematical definition also.

WolframAlpha can be used for vocabulary, for example, try typing ‘plus‘ into WolframAlpha.

Note that WolframAlpha has assumed plus is a character but you can choose to refer to a mathematical definition or a word (or an internet architecture topic). Choosing word will not only give definitions but a wealth of other information that you would not find in a dictionary such as the first known use of the word, frequency of use, rhyming words and much more!

Or perhaps try the Mathisfun dictionary.

The definitions in this dictionary are clear and attractively presented.

Further resources:

Dictionaries

• Mathwords – dictionary
• Harcourt Math Glossary grades 1-8
• Statistics Glossary

Reference

• Reference | Mathematics for Students
• The Wolfram Functions Site
• Wolfram MathWorld: The Web’s Most Extensive Mathematics Resource
• Maths, Science & Technology (BBC)
• Mathematical Moments from the AMS
• The Electronic Library of Mathematics
• Number Gossip
• Encyclopaedia of Mathematics
• Mathematics Dictionary
• Famous Curves Index

History

• Mathigon Timeline of Mathematics
• MacTutor History of Mathematics by Edmund Robertson, and John O’Connor, of the School of Mathematics and Statistics at the University of St Andrews.
• Mathematician of the day
• Earliest Uses of Various Mathematical Symbols
• Earliest Known Uses of Some of the Words of Mathematics
• Earliest Uses of Symbols for Constants

From Nathan Day, Famous Mathematicians From Around the World (Version 2) 82 mathematicians. 53 countries.
PDF.
Editable PPT
Individual posters