| D007854 |
Lead |
A soft, grayish metal with poisonous salts; atomic number 82, atomic weight 207.2, symbol Pb. |
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| D008386 |
Marine Biology |
The study of the origin, structure, development, growth, function, genetics, and reproduction of organisms which inhabit the OCEANS AND SEAS. |
Biology, Marine,Marine Ecology,Marine Hydrobiology,Ecology, Marine,Hydrobiology, Marine |
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| D009791 |
Oceanography |
The science that deals with the ocean and its phenomena. (Webster, 3d ed) |
Oceanographies |
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| D010933 |
Plankton |
Community of tiny aquatic PLANTS and ANIMALS, and photosynthetic BACTERIA, that are either free-floating or suspended in the water, with little or no power of locomotion. They are divided into PHYTOPLANKTON and ZOOPLANKTON. |
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| D011059 |
Polonium |
A radioactive element that is a member of the chalcogen family. It has the atomic symbol Po, atomic number 84, and the atomic weight of the isotope with the longest half-life (209Po) is 208.98. It decays by alpha-emission. |
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| D011868 |
Radioisotopes |
Isotopes that exhibit radioactivity and undergo radioactive decay. (From Grant & Hackh's Chemical Dictionary, 5th ed & McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed) |
Daughter Isotope,Daughter Nuclide,Radioactive Isotope,Radioactive Isotopes,Radiogenic Isotope,Radioisotope,Radionuclide,Radionuclides,Daughter Nuclides,Daugter Isotopes,Radiogenic Isotopes,Isotope, Daughter,Isotope, Radioactive,Isotope, Radiogenic,Isotopes, Daugter,Isotopes, Radioactive,Isotopes, Radiogenic,Nuclide, Daughter,Nuclides, Daughter |
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| D013019 |
South Africa |
A republic in southern Africa, the southernmost part of Africa. It has three capitals: Pretoria (administrative), Cape Town (legislative), and Bloemfontein (judicial). Officially the Republic of South Africa since 1960, it was called the Union of South Africa 1910-1960. |
Republic of South Africa,Union of South Africa |
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