1. Also called line of sighting.
an imaginary straight line
running through the aligned sights of a firearm, surveying equipment, etc.
Astronomy. an imaginary line from an observer to a celestial body, coincident with the path traveled by light rays receivedfrom the body.
Radio. a straight line connecting two points sufficiently high and near one another so that the line is entirely above the surface of the earth.
is always a great word to know.
So is ninnyhammer. Does it mean: