What word is this if the definition is : Refers to the power of the microscope; the objective lens multiplied by the eyepiece.
The word would be "magnification".
The word you are looking for is "magnification".
To find the word that refers to the power of the microscope, you can start by breaking down the definition and identifying key terms or phrases. In this case, the key terms are "the objective lens multiplied by the eyepiece."
In microscopy, the magnification of a microscope is usually determined by multiplying the magnification of the objective lens by the magnification of the eyepiece.
The word that represents this concept is "total magnification." Total magnification refers to the overall magnifying power achieved when both the objective lens and the eyepiece are used together.
Hence, the answer to your question is "total magnification".