| 单词 | potassium-40 |
| 释义 | potassium-40n.A naturally occurring beta-emitting radioactive isotope of potassium having a half-life of 1.3 billion years; it is the chief source of natural radioactivity of living tissue. Words nearby potassium-40potash feldspar, potass, potassa, potassic, potassium, potassium-40, potassium-42, potassium-43, potassium acetate, potassium antimonate, potassium-argon dating The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. |
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