a distortion produced by a lens in which the magnification decreases toward the edge of the field.
(photog) distortion of an image produced by an optical system that causes straight lines at image margins to bulge outwards
- Barrel engine
an engine having cylinders arranged around and parallel to a shaft, which they rotate by means of the contact of their piston rods with a swash plate or cam on the shaft.
any of the bathypelagic fishes of the family Opisthoproctidae, especially Macropinna microstoma, having telescoping eyes.
a blackish stromateid fish, Hyperoglyphe perciformis, inhabiting New England coastal waters.
either of the round, flat sections that form the top and bottom of a barrel. on the barrelhead, in advance or on demand: They won’t deliver the merchandise unless we pay cash on the barrelhead. Contemporary Examples After all, he provides “cash on the barrelhead” in exchange for a form of reality TV—college and professional […]