a radioactive isotope of cobalt having a mass number of 60 and a half-life of 5.2 years, used chiefly in radiotherapy.
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- cob money,
- cob pie,
- cobalt bloom,
- cobalt blue,
- cobalt bomb,
- cobalt green,
- cobalt violet deep
Origin of cobalt 60
First recorded in 1945–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for cobalt 60
Nothing happened although the board showed the gauge's cobalt-60 beta and gamma still hot.The Thirst Quenchers|Rick Raphael
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.