technical term; jargon; specialist terminology
Refers to words or expressions used within a specific field or profession, often difficult for outsiders to understand.
This paper has a lot of technical terms, so it's hard to understand.
The jargon doctors use can be difficult for patients to understand.
Refers to slang or colloquial language, not necessarily tied to a profession.
Compound of 専門 (specialty, expert) + 語 (word, language).