Wiktionary
n. (metal-working, manufacturing) A three-dimensional shape into which a thin flat sheet of material, e.g. metal, can be formed by bending alone, without stretching or compression.
Usage examples of "single curve".
Kyrth looked small below them, sheltered in a single curve of mountain.
Finally the orbital plot display coalesced into a single curve, and, after confirmation, Wilcox signed off.
Except for that single curve-a graded curve, which suggested that the vehicles that once traveled the road moved very swiftly, there was no other turn.
A single curve arched across the grid-work, with a blinking white dot hovering on the edge of the blue-shaded region.
By its linear design, it was Terran in origin, boxy and regimented without a single curve.
The few that did remain were either shattered or canted out of place, but standing at the point where it crossed the trail, almost at right angles, one could look for a long distance either way along the slash marked out by the road, running straight without a single curve.
Sulu peered inside each chamber as he passed it and saw strange configurations of corners and walls, all without a single curve or right angle, all apparently designed by an architect who was fanatically devoted to obtuse and acute angles and jagged edges.
The street he was on was very nearly straight, an oddity in human cities, with only a single curve in it perhaps a mile from the gate.