The DICT Development Group

  Vertiginous \Ver*tig"i*nous\, a. [L. vertiginosus, fr. vertigo a
     whirling around, giddiness: cf. F. vertigineux. See
     Vertigo.]
     1. Turning round; whirling; rotary; revolving; as, a
        vertiginous motion.
        [1913 Webster]
  
              Some vertiginous whirl of fortune.    --De Quincey.
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     2. Affected with vertigo; giddy; dizzy.
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              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.
        [1913 Webster]

  vertiginous
      adj 1: having or causing a whirling sensation; liable to
             falling; "had a dizzy spell"; "a dizzy pinnacle"; "had a
             headache and felt giddy"; "a giddy precipice"; "feeling
             woozy from the blow on his head"; "a vertiginous climb up
             the face of the cliff" [syn: dizzy, giddy, woozy,
             vertiginous]