ru·bai·yat (rbē-ät′, -bī-)
n. pl. rubaiyat or ru·bai·yats
A traditional Persian verse form consisting of a collection of quatrains, typically rhyming aaba.
[From Persian rubā'iyyāt, Arabizing pl. of rubā'ī, quatrain, from Arabic, fourfold, quatrain, from Arabic rubā', by fours, four by four; see rbʿ in the Appendix of Semitic roots.]
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