An Etymological Dictionary of Astronomy and Astrophysics

1. General: The state or fact of being visible. → crescent Moon visibility, → Venus visibility.
   

2. Optics: → fringe visibility. See also: → visibility function, → visibility plane.
   

3. Meteo.: A measure of transparency of the atmosphere. The maximum horizontal distance at which objects can be identified. → turbidity.

See also: → visible + → -ity.