In Arabic "rubai'i" refers to a type of 4-line verse, & this is a book of them, like Omar Khayyam's
[DOC] [TLE] Free Flashcards about POETS & POETRY - StudyStack [PAR] IN ARABIC "RUBAI'I" REFERS TO A TYPE OF 4-LINE VERSE, AND THIS BOOK 
IS A BOOK OF THEM, LIKE OMAR KHAYYAM'S, A RUBAIYAT.