I'm unfortunate in having relatives who are doctors. Actually, it's not that they're doctors which is the problem. Rather, it's the fact that they have no sense of register.
Register, when discussing the English language, is often thought to refer to the level of formality of the English being used. Amongst highfalutin' applied linguists and highly-qualified EFL professionals, however, it refers to a style of language used by a particular speech-community (i.e. a group of people who talk to each other as a closed community), in a specific context.
As an example, the terms valid argument and sound argument have a specific meaning that is quite different from what they mean in other contexts when used by academic philosophers and logicians—in other words when used in a philosophical register. In conversational everyday language, a 'valid argument' might be one that's well-substantiated or is based on common sense. A sound argument would mean something similar. However, in philosophy a valid argument is one which is guaranteed to be true by virtue of its form - if its assumptions are true. Consider the following:
- George Bush is mortal. (assumption)
- Men are mortal. (assumption)
- Therefore George Bush is a man. (conclusion)
The conclusion of this argument is true. The assumptions are also true. However, it is not valid, in the philosophical sense, because arguments of the same form may be false, even if their assumptions are true. Consider:
- George Bush is mortal.
- Blue bottomed baboons are mortal.
- Therefore George Bush is a blue bottomed baboon.
Here we see that (6) is false. An argument in the form of (1-3) or (4-6) is not guaranteed to be true just because its assumptions are true. This argument is not valid in the sense that word has when used in a philosophical register.
So, back to my medical family members. Excruciatingly embarrassingly for me and other more linguistically sensitive friends, my family have no sense of register. They use words and phrases—that would be acceptable, if not expected, in a medical context with other medical professionals, or with patients—in non-medical situations and environments when it is completely inappropriate.
One of many examples: it was not unheard of for one of these people to say in a restaurant "Excuse me, my son needs to pass faeces, where are the toilets?" instead of just asking where the restroom/loos were or saying that their son needed to go to the toilet. Similar cases abounded with questions to young children like "Do you need to urinate?". These types of phrases are quite normal, but only in a medical register!
I have only recently become familiar with the term the academy to refer to the world of academia or similar. However, I have suddenly started hearing it a lot over the past year or two. I am fairly confident that it is only used in a formal academic register, when the topic of academia is itself being discussed. In other words, even within the sociology or historiography of academia, it is a piece of affected metalanguage.
Is it the right phrase when used outside of that particular environment? I think probably not. Not because it will break some rule of English, but because it's in the wrong register; firstly, your conversant may not understand exactly what you're saying, and secondly, because even if they do, you may sound like you're from a different planet.