Number Prefixes: bi (two)

Learn these words beginning with the prefix bi-, meaning "two."
13 words 165 learners

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Full list of words from this list:

words only definitions & notes
  1. bicycle
    a vehicle that has two wheels and is moved by foot pedals
  2. binoculars
    an optical instrument for simultaneous use by both eyes
  3. bilingual
    using or knowing two languages
  4. bimonthly
    occurring twice in one of the year's twelve divisions
  5. bipartisan
    supported by both sides
  6. bisect
    cut in half or cut in two
  7. biped
    an animal that walks on two legs
  8. bifocal
    having two foci
  9. biweekly
    occurring twice every seven days
  10. biannual
    occurring or payable twice each year
  11. biennial
    occurring every second year
  12. binary
    of or pertaining to a number system having 2 as its base
  13. bivalve
    a sea creature with two connected hinged shells
Created on Tue Jun 03 20:33:17 EDT 2025 (updated Fri Jun 06 13:50:49 EDT 2025)

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