spiral staircase

British  

noun

1. a staircase constructed around a central axis

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Example Sentences

After seeing an X-ray image of DNA taken by crystallographer Rosalind Franklin, they built a 6-foot-tall metal model of a double helix, shaped like a spiral staircase, with the rungs made of the bases adenine and thymine, guanine and cytosine.

From Los Angeles Times

“The mansion features seven marble fireplaces, original chandeliers and sconces, a Virginia blue slate roof, copper gutters and downspouts, and a floating spiral staircase that is rumored to be the first in the country,” it continues.

From MarketWatch

For instance, an outdoor spiral staircase, a connection between the deck and the ground-floor garage studio, is a striking feature.

From Los Angeles Times

A spiral staircase separating the living room from the kitchen leads up to the bedroom, arranged how a set designer might install a backstage for a performer in a show or documentary, just extravagant enough to indicate you’re in the territory of fantasy-building and an artist’s practical magic.

From Los Angeles Times

Another entrance awaits those with 'extra' hospitality tickets and features a golden, well-lit spiral staircase serving various lounges up from the basement to the fifth floor where the pool is.

From BBC