cm
noun
2.
a radioactive transuranic metallic element; produced by bombarding plutonium with helium nuclei
Origin
Sense "commercial" is a borrowing from Japanese CM (CM, “commercial video ad”), from English commercial + message.
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Part of
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.