The New Princeton Encyclopedia of Poetry and Poetics
From abecedarius to zeugma, by way of cywydd, estribillo,  Nibelungenstrophe, Tachtigers, and other poetic terms that sound like poetry,The  New Princeton Encyclopedia of Poetry and Poeticsis a gold mine for readers and  writers of poetry alike. First published in 1965, this tome has evolved to reflect  developments in critical thinking and an expanding knowledge of non-Western poetry  (without, heaven forfend, being trendy: "a reference work," the editors  explain, "must always distance itself from its time while it works to embrace that  time"). For this third edition, the editors write, nearly every entry has been changed  significantly, and 162 entries have been added. The preface claims coverage of every  poetic tradition in the world, and one doesn't doubt it. There's enough material here to  keep one browsing well pastYeats's "Second  Coming." If that's not enough to quench your poetic thirst, fret not: a detailed  bibliography concludes each entry.