A ramp or pathway that spirals around a central axis, like a continuous curved staircase.
From helix (spiral) + -cline (slope, from Greek klinein 'to lean'). This architectural term combines Greek roots to describe surfaces that continuously incline while spiraling.
The Vatican's Bramante Staircase is a famous helicline—you can walk up it continuously without ever turning a corner, and it was so revolutionary when built in the 1500s that it changed how architects thought about space and movement.
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