In Norse mythology, Mímameiðr (Old Norse "Mimi's tree"[1]) is a tree whose branches stretch over every land, is unharmed by fire or metal, bears fruit that assists pregnant women, and upon whose highest bough roosts the cock Víðópnir.
[2] Mímameiðr is mentioned in stanzas of the eddic-meter poem Fjölsvinnsmál, where the tree is described as having limbs that stretch over every land, bearing helpful fruit, and as harboring the cock Víðópnir.
The first mention occurs when Svipdagr asks Fjölsviðr to tell him what the name of the tree whose branches reach over every land.
Fjolsvith responds that: This stanza is followed by another where Svipdagr asks Fjölsviðr what grows from the seed of the tree.
Fjölsviðr complies, revealing that the cock is named Víðópnir: Scholar Rudolf Simek connects Mímameiðr with Mímisbrunnr ("Mímir's well"), which is located beneath one of the three roots of the cosmological tree Yggdrasil.