It's called a "double delta" because the forward part of the wing slopes backward in a sharp triangle while the back half spreads out at a wide angle.

It made a neat sharp triangle about seven or eight feet on a side.

It formed a sharp triangle, the walls of which were too high and sheer to be climbed, wounded leg or no.

Stylistic, brilliantly simple works from 1968, like "Yellow Black," a sharp two-color triangle pointing to the right, create an extreme and witty spatial perspective.

The four spots were sharp triangles, arranged in a precise square at the very bottom of the spine, completely enclosed in a fused mass of bony growth.

The vestige of a cowlick adorns a straight white thatch combed in schoolboy fashion to frame the sharp isosceles triangle of his cheekbones.

But large areas of his compositions are sharp white triangles, and this abstract quality makes them modern.

They had the sharp triangle of the reptilian skull, the cruelty of the sharpness softened by the liquid compassion of the eyes.

Allowed to hop skip jump behind Dr. right up to where it ends in a sharp wind-swept triangle.