This is the 11055th most frequent Russian word.
гинекологии
The Russian word "гинекологии" means "gynecology," the branch of medicine dealing with the health of the female reproductive system.
Here, 'гинекологии' is used to refer to the field of study focused on women's health.
Я изучаю книги по гинекологии, потому что хочу стать врачом.
I study books on gynecology because I want to become a doctor.
In this sentence, 'гинекологии' is mentioned as the subject matter of a university course.
В университете мы проходили курс по гинекологии.
At the university, we took a course on gynecology.
Here, 'гинекологии' denotes the specific field of medicine in which the person works.