Direct answer: Medicinal pine tar is pine tar discussed or prepared for historical, pharmaceutical, or topical product contexts. It should not be treated as a do-it-yourself medical recommendation.
Pine tar has a long history in soaps, ointments, veterinary products, and folk preparations. That history is real, but modern health-related use depends on regulation, formulation, concentration, labelling, and professional guidance. Crude craft tar and regulated product ingredients are not the same thing.
The term may appear on old medicine bottles, historical pharmacy texts, tar soaps, dandruff products, animal-care products, or ingredient databases. On a general information site, the correct focus is what the term means and how it differs from craft pine tar.
Medicinal pine tar is not just any pine tar rubbed onto skin. It implies a product made, refined, assessed, and labelled for a specific regulated purpose. Coal tar has a separate medical history and separate risks, so the two should not be blended together casually.
In short: A historical and regulated-use phrase. Related to pine tar in soaps, ointments, and topical products. Crude craft tar should not be assumed safe for skin. No medical advice should be given from the material name alone.