Temporal arteritis, also known as giant cell arteritis, is a condition that involves blood vessel inflammation and damage. According to the University of Maryland Medical Center, this condition may affect the medium or large arteries that supply blood to your head, neck, upper body and arms.
Definition of opportunity cost. : the added cost of using resources (as for production or speculative investment) that is the difference between the actual value resulting from such use and that of an alternative (such as another use of the same resources or an investment of equal risk but greater return)
Updated August 01, 2016. Unlike most costs discussed in economics, an opportunity cost doesn't necessarily involve money. The opportunity cost of any action is simply the next best alternative to that action - or put more simply, What you would have done if you didn't make the choice that you did.