Definition of americium
: a radioactive metallic element produced artificially by bombarding plutonium with high-energy neutrons — see element table
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Recent Examples of americium from the Web
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The criminal complaint says those were thorium and americium, both radioactive metals.
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Power would come from a tiny radioactive source like americium, the element in smoke detectors.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'americium.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of americium
New Latin, from America + New Latin -ium
Medical Dictionary
americium
playMedical Definition of americium
: a radioactive metallic element produced by bombardment of plutonium with high-energy neutrons—symbol Am; see element table
Learn More about americium
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Britannica.com: Encyclopedia article about americium
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