[[caption-width-right:325: [- The ''Codex Regius'': Not actually that impressive.[[note]]Size of the pages is c. 5.2 x 7.5 "[[/note]] -] ]]

''Edda'' was originally only the name of Creator/SnorriSturluson’s poetic manual (written c. 1220 CE), which was subsequently called ''Literature/SnorraEdda'' (Snorri’s Edda) or, more recently, ''Literature/ProseEdda''. The name has often been taken to mean "great-grandmother", but this interpretation is considered outdated; state of the art is that it derives from the Latin "edo", "I compose poetry".

Centuries after Snorri, the term ''Edda'' was extended to include the so-called ''Literature/PoeticEdda''. The latter is actually not a single, fixed work, but a collective term for all mythological poetry preserved in UsefulNotes/{{Iceland}}ic manuscripts. The bulk of these poems, however, is contained in a single manuscript, the ''Literature/CodexRegius'' (the King’s Book), a tome that was created c. 1270 CE, though it is probably the copy of a book that had been around since 1230 CE. Editions under the name ''Poetic Edda'' usually combine the contents of the ''Codex Regius'' with lays found in a variety of other manuscripts, the composition of which varies. Those lays that are considered part of the ''Poetic Edda'', but are not found in the ''Codex Regius'', are sometimes called the ''Eddica Minora'' ("lesser Eddic lays"). The lays that form the ''Poetic Edda'' are generally of anonymous authorship.

Thus, the term ''Eddas'' has come to be used for Icelandic mythological literature in general, and mythological and heroic poetry is "Eddic poetry". As you may have realized, the definition is slightly arbitrary; for example, Literature/{{Icelandic sagas}} relating heroic legend (the ''fornaldarsögur'') are not considered "Eddic".

''Poetic Edda'' and ''Prose Edda'' are sometimes still referred to as ''Elder Edda'' and ''Younger Edda'' respectively. This terminology is considered outdated; the lays of the ''Poetic Edda'' are no longer regarded as invariably older than ''Snorra Edda'', and the compilation of the ''Codex Regius'' was in fact done ''after'' the ''Snorra Edda'' (it is even possible that Snorri Sturluson had a part in putting the ''Codex'' together). Even older literature may refer to the ''Codex Regius'' as ''Sæmundar Edda'' – based on the old but equally outdated tradition that the book was composed by Sæmundr Sigfússon "the Wise" (1056-1133), the founding father of Icelandic literature.

Most of our knowledge on Myth/{{Norse mythology}} (not necessarily on heroic legend) is taken from the Eddas. The only non-Icelandic source that can compete is ''Literature/GestaDanorum'' a.k.a. the ''Danish History'' of Saxo "Grammaticus", which however is far less often consulted or referenced in popular representation of Norse mythology.
!! Tropes found in both Eddas:
%%Tropes referring specifically to the Prose Edda or Poetic Edda should go only to those pages. Tropes found in both works can be listed here.

* AdamAndEvePlot: The first humans are created by Odin and his two brothers as a couple, Ask and Embla ("Völuspá"/ "Gylfaginnig"). Also, only one human couple, Lif and Lifthrasir, will survive Ragnarok, and then repopulate the Earth ("Vafthrúdnismál"/ "Gylfaginning").
* CreationMyth: The creation of the world is recounted in "Völuspá" (''Poetic Edda'') and "Gylfaginning" (''Prose Edda'').