Also known as: RA#, RA...
RA has various meanings in the Medical category. Discover the full forms, definitions, and usage contexts of RA in Medical.
The chamber of the human heart in which oxygen-poor blood enters through a major vein called the vena cava.
MedicalA radioactive decay product of uranium often found in uranium ore. It has several radioactive isotopes. Radium-226 decays to radon-222. A radioactive element which the chemical symbol Ra; radium and its salts are used in gamma ray radiography because of their radioactivity. Melting point is 700 B0C (1292 B0F).
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