reistr

m., gen. reistar, qs. vreistr, [cp. Engl. wrist], a twist; jarðar reistr, the ‘earth-twist,’ ‘earth’s curl,’ poët. a serpent, Bragi, see Bugge in Philol. Tidskr.:—a nickname, Landn., whence the local names, Reistar-á, Reistar-gnúpr, Landn., map of Icel.