I'm sorry for any confusion, but "Ukraine" is a country located in Eastern Europe and it is not a medical term or concept. Therefore, I can't provide a medical definition for it.

April 25th -26th, 1986 nuclear power accident that occurred at Chernobyl in the former USSR (Ukraine) located 80 miles north of Kiev.

The Republic of Belarus is a sovereign country located in Eastern Europe, known for its advanced medical facilities and highly trained healthcare professionals, offering a wide range of medical services including but not limited to cardiology, oncology, neurology, and transplantation, among others.

Uncontrolled release of radioactive material from its containment. This either threatens to, or does, cause exposure to a radioactive hazard. Such an incident may occur accidentally or deliberately.

A combined vaccine used to prevent infection with diphtheria and tetanus toxoid. This is used in place of DTP vaccine (DIPHTHERIA-TETANUS-PERTUSSIS VACCINE) when PERTUSSIS VACCINE is contraindicated.

I'm sorry for any confusion, but "Russia" is a country and not a medical term. Therefore, it doesn't have a medical definition.

"Eastern Europe," in a geomedical context, often refers to a region including countries that were once part of the Soviet Union or influenced by its culture and healthcare system, such as Russia, Ukraine, Belarus, and sometimes including countries in the Balkan Peninsula and Baltic states."

Methods of contraception in which physical, chemical, or biological means are used to prevent the SPERM from reaching the fertilizable OVUM.

USSR (Union of Soviet Socialist Republics) cannot be provided as a medical definition, as it is not a medical term; it refers to a former political state that existed from 1922 until 1991 and was dissolved into multiple independent countries.

A localized infection of mucous membranes or skin caused by toxigenic strains of CORYNEBACTERIUM DIPHTHERIAE. It is characterized by the presence of a pseudomembrane at the site of infection. DIPHTHERIA TOXIN, produced by C. diphtheriae, can cause myocarditis, polyneuritis, and other systemic toxic effects.

Removal of ENVIRONMENTAL POLLUTANTS or contaminants for the general protection of the environment. This is accomplished by various chemical, biological, and bulk movement methods, in conjunction with ENVIRONMENTAL MONITORING.

I'm sorry for any confusion, but the term "Azerbaijan" is not a medical concept or condition that has a defined meaning within the medical field. It is the name of a country located in the South Caucasus region of Eurasia. If you have any questions related to geography, history, or culture, I would be happy to try and help with those instead!

Blocking the process leading to OVULATION. Various factors are known to inhibit ovulation, such as neuroendocrine, psychological, and pharmacological agents.

**I'm sorry for any confusion, but "Greenland" is not a medical term.** It is a geographical location, the world's largest island, located between the Arctic and Atlantic oceans, primarily inhabited by Inuit and Danish populations. If you have any medical questions or terms, I'd be happy to help clarify those!

I'm sorry for any confusion, but "Moldova" is not a medical term and does not have a medical definition. It is the name of a country located in Eastern Europe, bordered by Romania to the west and Ukraine to the north, east, and south. If you have any questions related to healthcare or medical topics, I would be happy to help with those!

Unstable isotopes of cesium that decay or disintegrate emitting radiation. Cs atoms with atomic weights of 123, 125-132, and 134-145 are radioactive cesium isotopes.

An ancient country in western Asia, by the twentieth century divided among the former USSR, Turkey, and Iran. It was attacked at various times from before the 7th century B.C. to 69 B.C. by Assyrians, Medes, Persians, the Greeks under Alexander, and the Romans. It changed hands frequently in wars between Neo-Persian and Roman Empires from the 3d to 7th centuries and later under Arabs, Seljuks, Byzantines, and Mongols. In the 19th century Armenian nationalism arose but suffered during Russo-Turkish hostilities. It became part of the Soviet Republic in 1921, with part remaining under Turkey. (Webster's New Geographical Dictionary, 1988)

The formaldehyde-inactivated toxin of Corynebacterium diphtheriae. It is generally used in mixtures with TETANUS TOXOID and PERTUSSIS VACCINE; (DTP); or with tetanus toxoid alone (DT for pediatric use and Td, which contains 5- to 10-fold less diphtheria toxoid, for other use). Diphtheria toxoid is used for the prevention of diphtheria; DIPHTHERIA ANTITOXIN is for treatment.

Pollutants, present in soil, which exhibit radioactivity.

Tumors, cancer or other neoplasms produced by exposure to ionizing or non-ionizing radiation.

The Commonwealth of Independent States (CIS) is not a medical term or concept, but a regional organization that consists of post-Soviet states, and therefore, it does not have a medical definition.