calcium-45
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calcium-45
[′kal·sē·əm ‚fȯrd·ē′fīv] (nuclear physics)
A radioisotope of calcium having a mass number of 45, often used as a radioactive tracer in studying calcium metabolism in humans and other organisms; half-life is 165 days. Designated 45Ca.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.