This is the 11016th most frequent Russian word.
гематологии
Hematology: the study of blood, blood-forming organs, and blood diseases.
In this sentence, the word "гематология" is used as the subject noun referring to the specific medical field of study.
Гематология изучает строение и функции крови.
Hematology studies the structure and functions of blood.
Here, "гематология" is employed as the object noun indicating the focus of academic specialization.
В университете он решил специализироваться в гематологии.
At the university, he decided to specialize in hematology.
The word "гематология" is utilized as a noun signifying the field of knowledge, highlighting its advancements.