The term seeing is used to describe how faint an object can be detected by a telescope.

False, the term seeing is not used to describe the measure of faint an object can be detected.

Explanation:

Astronomers use the term "seeing" to suggest the effect of turbulence created by atmosphere. As per telescopes, the larger the area of telescope, the more accurately it can detect fainter objects. This is because the area of telescope is directly proportional to the light collected in it.

Thus, the term seeing and ability to observe fainter object is completely independent of each other. So, it is a false statement that the term seeing is used to describe how faint an object can be detected by a telescope.