Pronunciation: /baɪ/ Explain

The prefix 'bi' means two. Some mathematical words that use this prefix are:

  • biconditional: A condition that goes two ways.
  • bifurcate: To divide into two parts.
  • binary: Having two parts.
  • binary set: A set with exactly two elements. An example of a binary set is the set of truth values: { false, true }.
  • binary number: A number that expressed using exactly two digits { 0, 1 }. A binary number is also called a base 2 number.
  • binary operation: An operation that takes exactly two operands, such as addition.
  • binomial: A polynomial with exactly two terms such as 3x - 4y2.
  • bisect: To divide into two equal parts.


  1. McAdams, David E.. All Math Words Dictionary, bi. 2nd Classroom edition 20150108-4799968. pg 25. Life is a Story Problem LLC. January 8, 2015. Buy the book

Cite this article as:

McAdams, David E. Bi. 4/12/2019. All Math Words Encyclopedia. Life is a Story Problem LLC.

Revision History

4/12/2019: Changed equations and expressions to new format. (McAdams, David E.)
12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)
6/22/2018: Removed broken links, updated license, implemented new markup. (McAdams, David E.)
1/8/2010: Added "References". (McAdams, David E.)
6/24/2008: Initial version. (McAdams, David E.)

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