biannual

[bahy-an-yoo-uhl]
adjective
1.
occurring twice a year; semiannual.
2.
occurring every two years; biennial.

Origin:
1875–80; bi-1 + annual

biannually, adverb

biannual, biennial, semiannual (see usage note at bi-).


See bi-1.
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World English Dictionary
biannual (baɪˈænjʊəl)
 
adj
Compare biennial occurring twice a year
 
bi'annually
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

biannual
also bi-annual; "every six months," 1877, from bi- + annual.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Pictures are taken from photo points on a bimonthly basis for the first year and biannually for year two.
Organizations typically schedule these events annually or biannually.
Detailed reports of births and deaths based on preliminary data produced biannually.
Police officer tests are administered biannually and testing methods are constantly reviewed and updated.
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