The Collaborative International Dictionary
Vertiginousness
Vertiginous \Ver*tig"i*nous\, a. [L. vertiginosus, fr. vertigo a whirling around, giddiness: cf. F. vertigineux. See Vertig??.]
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Turning round; whirling; rotary; revolving; as, vertiginous motion.
Some vertiginous whirl of fortune.
--De Quincey. -
Affected with vertigo; giddy; dizzy.
They [the angels] grew vertiginous, and fell from the battlements of heaven.
--Jer. Taylor. [1913 Webster] -- Ver*tig"i*nous*ly, adv. -- Ver*tig"i*nous*ness, n.
Wiktionary
vertiginousness
n. The quality of being vertiginous.