[forbiddenvoid]

Then why not just say 'domain-specific meaning?'

Term of art doesn't really have a clear meaning in general (native English speaker, and this is the first time I've heard this), and it's unclear/ambiguous as to what it actually indicates.

[naniwaduni]

Because "term of art" is the term of art...

"Domain-specific" is nonsense gibberish to people outside ~computing, more or less.

[eyelidlessness]

It’s pretty much exactly as intuitive as “state of the art”—a term of art I didn’t understand as anything beyond a superlative until I had heard it for 20 years and decided to give it a think. Which is to say, not very intuitive at all, until you just pick it apart and think about how it might relate in context, and then it’s just reflexive.

[JJMcJ]

First time I read "term of art" I knew exactly what was meant. It doesn't seem that obscure.

However, I was already familiar with "start of the art" so it wasn't that great a leap.

[aesh2Xa1]

"Jargon" is a good word for this case.

[shemtay]

"Jargon" sounds pejorative to me, and implies that the phrasing is difficult for outsiders to understand.

"Term of art" only implies that it is the specific phrasing used by practitioners to describe the matter at hand.

[anoncake]

Does that imply that the meaning is well-defined like "term of art" does?

[aesh2Xa1]

Yes, it requires that the idea is defined in a concise way that is professionally/contextually restricted.

Use "term of art" if you'd like. I think "jargon" is a commonplace alternative and I like it.