“Equity is a slippery word, and hard to grasp. What makes it so slippery is its long history, and the many uses to which the word has been put. In legal usage, there are at least three different meanings for this word. One is the recognition of an exception to a general rule. This meaning can be traced back to Aristotle. In the Nicomachean Ethics he says …” (more)
Samuel L Bray, ‘A Student’s Guide to the Meanings of “Equity”‘. Open Science Framework, 2016-07-20.