| The American Heritage® Dictionary of the English Language: Fourth Edition. 2000. |
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| didymium |
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| SYLLABICATION: | di·dym·i·um |
| PRONUNCIATION: |  d -d m  - m |
| NOUN: | 1. Symbol Di A metallic mixture, once considered an element, composed of neodymium and praseodymium. 2. A mixture of rare-earth elements and oxides used chiefly in manufacturing and coloring various forms of glass. | | ETYMOLOGY: | From Greek didumos, twin, double. See dwo- in Appendix I.
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| The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved. |
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