ˈhī(ˌ)kü noun
( plural haiku )
Etymology: Japanese
: an unrhymed Japanese poem of three lines containing 5, 7, and 5 syllables respectively, referring in some way to one of the seasons of the year, and constituting a late 19th century development of the hokku ; also : a poem written in the haiku form or a modification of it but in a language other than Japanese