from The Century Dictionary and Cyclopedia
- Noting an electric arc-lamp of approximately half the usual illuminating power.
Sorry, no etymologies found.
One is called the Slingshot (half-arc), and the other is the Windmill (one or more arcs).
Then, getting no answer but shrugs from the ranks surrounding them both in an irregular half-arc, he said directly to Si'Wren, "Woman, look at me!"
Three hundred feet from point to point, and no less than five hundred and fifty round the curve, that half-arc soared touching the bridge it supported for a space of fifty feet only, one end resting on and built into the parent archway, and the other embedded in the solid granite of the side of the precipice.
The half-arc shape is consistent with a head-on merger of clusters of roughly equal mass.