Musa Mirmammad oglu Abdullayev (27 November 1927, Masallı district, Azerbaijan SSR, USSR — 8 August 1979, Baku, Azerbaijan SSR, USSR) — Prominent hematologist of Azerbaijan, doctor of medicine, professor, philologist-translator. He was one of the eight members of the anti-Soviet nationalist student-youth political organization "Lightning" (İldırım), formed for the independence of Azerbaijan within 1942-1944. Life Musa Mirmammad oglu Abdullayev was born on November 27, 1927, in Gizilagaj village of Masalli region in an intellectual family. His English and Russian were fluent even since high school. The fact that he took a lesson of English from Zinin, a prominent German physician of the time, living in the village of Slavyanka in Gadabay district was a great stimulus for him to understand events more deeply and an important condition for the radiance of his talent as a translator. When he was a schoolboy, his father Mirmammad Abdullayev moved to Baku with his family due to civil service. After graduating from high school with honors, he graduated from the treatment and prevention faculty of the Azerbaijan State Medical Institute, as well as the English language faculty of the Azerbaijan State Pedagogical Institute of Foreign Languages (present Azerbaijan University of Languages) From 1958 he worked at the Azerbaijan Scientific Research Institute of Hematology and Blood Transfusion, studied the blood clotting system. In 1963-66 he worked as a scientific secretary at the Azerbaijan State Medical Institute, defended his Ph.D. and doctoral dissertations for ten years, and obtained the academic title of professor. (1967–68) In 1967 he published a monograph: "Several issues of blood clotting in the norm and pathology.", With this monograph, the prominent hematologist laid the foundation of the scientific theory of blood clotting. This monograph attracted the attention of hematologists of the former USSR. The invention contained in this monograph has been approved in 25 April 1967 issue of the Medichinskaya Gazeta, published in the USSR. Innovative scientist Musa Abdullayev, who attracted the attention of hematologists abroad, was invited to the 12th International Conference of Hematologists held in 1969 – to the Federal Republic of Germany but was not admitted to the international conference by the former USSR government. Despite his acquittal in 1956 for his political activities in "Lightning"(İldırım), the prominent scientist was invited to international scientific conferences held by foreign countries, but the Soviet regime blocked him each time. Although these people, including Musa Abdullayev, were acquitted, the Soviet government was