An instrument for obtaining, and transferring to a picture, the points and outlines of objects, so as to represent them in their proper geometrical relations as viewed from a single point.

(Philippines, rare) sweet potato

a large expanse of very flat and smooth ocean floor, usually found at depths of 4,600 to 5,500 meters (15,000 to 18,000 feet).

simple past tense and past participle of retroflect