Obs. In 1 swinglung, (swinclung), 5 swyngyllyng. [Cf. Icel. svingla to rove, Da. svingla to reel, stagger, svingling reeling, giddiness. The form in the northern Alph. Tales may be from Scandinavian.] Giddiness, dizziness, vertigo.
c. 1000. Ælfric, Gloss., in Wr.-Wülcker, 112/18. Scotomia, swinglung.
c. 1000. Sax. Leechd., I. 344. Ðam mannum þe swinclunge [v.r. swinglunge] þrowiað.
c. 1440. Alphabet of Tales, 19. And þer fell a swyngyllyng in his hede þat he wex fonde with.