In dictionaries:
Primary central nervous system lymphoma
Primary central nervous system lymphoma, also termed primary diffuse large B-cell lymphoma of the central nervous system, is a primary intracranial tumor appearing mostly in patients with severe immunodeficiency (typically patients with AIDS).
primary life support system
A backpack, worn on a space suit, that provides breathable oxygen and removes expelled carbon dioxide
Joint Primary Aircraft Training System
an aircraft procurement program of the United States in the 1990s by the United States Air Force and United States Navy, a merger of 1980s era training aircraft programs.
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