What term describes words used by people in a particular field of work?

The term that describes words used by people in a specific field of work is jargon. Jargon consists of specialized vocabulary that is unique to particular professions or groups, enabling effective communication among individuals within that field. For example, medical professionals use terms like "hypertension" or "anemia," which might not be easily understood by individuals outside the healthcare environment.

The other choices, while related to language use, do not specifically refer to vocational terminology. Colloquialisms are informal words or phrases used in everyday conversation but may not be linked to a particular field. Slang refers to informal and often non-standard language, which can vary regionally or culturally but isn’t confined to professional contexts. Dialect involves variations in language associated with geographical areas or social groupings, including differences in pronunciation, grammar, and vocabulary, rather than the specialized vocabulary of a profession.