triannual

[ trahy-an-yoo-uh l ]
/ traɪˈæn yu əl /

adjective

done, occurring, issued, etc., three times a year.

noun

a triannual publication, contest, etc.

Origin of triannual

First recorded in 1630–40; tri- + annual

Related forms

tri·an·nu·al·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019