This is the 12903rd most frequent Russian word.
лекарственного
"Of medicinal" or "medicinal."
In this sentence, 'лекарственного' is used as an adjective derived from the noun 'лекарство' (meaning 'medicine') to describe oil with medicinal or healing properties.
Этот магазин специализируется на продаже лекарственного масла.
This store specializes in selling herbal oil.
Here, 'лекарственного' qualifies 'растительного сырья' (plant materials), indicating that these materials are used for medicinal purposes.
Во время путешествия важно иметь с собой список лекарственного растительного сырья.
During the journey, it is important to have a list of medicinal plant materials.
In this context, 'лекарственного' describes 'взаимодействия' (interaction), suggesting it pertains to the effects related to medicine or pharmaceuticals.