Magnification n. : The act of magnifying; enlargement; exaggeration.

Example:
What is the total Magnification of an object under a microscope on medium power?

Taxonomy
magnification, optical magnification, telescope magnification, eyepiece, maximum magnification, the eye, lens, microscope, magnifying glass, telescope, focal point, the distance, free encyclopedia, focal length, Minification, linear dimension, subtended, optical microscope.

Defination from the web:
magnification is related to scaling up visuals or images to be able to see more detail, increasing resolution, using optics, printing ... Angular magnification — For optical instruments with an eyepiece, the linear dimension of the image seen in the eyepiece (virtual image in ...