a line connecting all the possible positions of a ship or aircraft, as determined by a single observation.
noun, Football. 1. an imaginary line parallel to the goal lines that passes from one sideline to the other through the point of the football closest to the goal line of each team. noun 1. (American football) an imaginary line, parallel to the goal lines, on which the ball is placed at the start of […]
noun 1. Also called line of sighting. an imaginary straight line running through the aligned sights of a firearm, surveying equipment, etc. 2. Astronomy. an imaginary line from an observer to a celestial body, coincident with the path traveled by light rays receivedfrom the body. 3. Radio. a straight line connecting two points sufficiently high […]
noun, Military. 1. a straight line from the muzzle of an artillery gun to its target.
noun, Ophthalmology. 1. a straight line that connects the fovea centralis of an eye with the point on which the eye focuses. noun 1. (ophthalmol) a straight line extending from the fovea centralis of the eye to an object on which the eye is focused Also called line of sight