1. Medicine: Medical terminology is heavily rooted in Latin. Many anatomical structures, diseases, and procedures have Latin names.
2. Law: Legal language, especially in common law systems, is often infused with Latin phrases and terminology.
3. Biology: Like medicine, biological classification, especially for plants and animals, uses Latin names (binomial nomenclature).
4. Classical Studies: This field obviously uses Latin extensively for studying literature, history, and culture of the Roman world.
Bonus: While not strictly a field of study, the Catholic Church still uses Latin in many of its liturgical services and documents.