Verse form consisting of four half-lines complete in themselves, with the rhyme scheme aaba. This form has traditionally been used by Persian, Arabic, and Turkish poets. Edward Fitzgerald's... Found on http://www.encyclo.co.uk/local/20688
Ru·bai·yat' noun plural ; sing. Rubai [ Arabic rubā'iyāh quatrian, plural of rubā'iy having four radicals, from rubā' four.] Quatrians; as, the Rubaiyat of Omar Khayyam. Sometimes in plural construe... Found on http://www.encyclo.co.uk/webster/R/100