MIDGARDSORMR [The serpent of Midgaard]. The world-serpent hidden in the ocean, whose coils gird around the whole Midgard. Thor once fishes for him, and gets him on his hook. In Ragnarok Thor slays him, but falls himself poisoned by his breath. _Midgard-serpent._
MIMAMEIDR. A mythic tree; probably the same as Ygdrasil. It derives its name from Mimer, and means Mimer's tree. _Mimameider._
MIMIR. The name of the wise giant keeper of the holy well Mimis-brunnr, the burn of Mimer, the well of wisdom, at which Odin pawned his eye for wisdom; a myth which is explained as symbolical of the heavenly vault with its single eye, the sun, setting in the sea.
MJOLNIR. Thor's formidable hammer. After Ragnarok, it is possessed by his sons Mode and Magne. _Mjolner._
MISTILTEINN [Eng. _mistletoe_]. The mistletoe or mistletwig, the fatal twig by which Balder, the white sun-god, was slain. After the death of Balder, Ragnarok set in. Balder's death was also symbolical of the victory of darkness over light, which comes every year at midwinter. The mistletoe in English households at Christmas time is no doubt a relic of a rite lost in the remotest heathendom, for the fight of light and darkness at midwinter was a foreshadowing of the final overthrow in Ragnarok. The legend and the word are common to all Teutonic peoples of all ages. _Mistletoe._
MODSOGNIR. The dwarf highest in degree or rank. _Modsogner._
MUNDILFARI. Father of the sun and moon. _Mundilfare._
MUNINN [Memory]. One of Odin's ravens. _Munin._
MUSPELL. The name of an abode of fire. It is populated by a host of fiends, who are to appear at Ragnarok and destroy the world by fire. _Muspel._
MUSPELLSHEIMR. The abode of Muspel. This interesting word (_Muspell_) was not confined to the Norse mythology, but appears twice in the old Saxon poem Heliand. In these instances _muspel_ stands for the _day of judgment_, _the last day_, and answers to Ragnarok of the Norse mythology.
MOKKURKALFI [A dense cloud]. A clay giant in the myth of Thor and Hrungner. _Mokkerkalfe._
NAGLFAR [Nail-ship]. A mythical ship made of nail-parings. It appears in Ragnarok. _Naglfar._ _Nailship._
NANNA. Daughter of Nep (bud); mother of Forsete and wife of Balder. She dies of grief at the death of Balder. _Nanna._