spiral

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See: sinuous
References in periodicals archive ?
Within a week, Allen's lead in the polls dropped 17 per cent and kept spiralling downward.
Sadly, it was the start of the spiralling downward trend of one of the greatest players the world had ever seen.
They sent Railtrack to the brink of the abyss on Tuesday with a mass sell-off that sent the shares spiralling downward by 21 per cent at one stage to an all-time low of 347p.