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amethopterin
amethyst
ametropia
Amex
Amexica
Amexican
amfetamine
Amharic
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amianthus
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amicus curiae
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americium
am·er·i·ci·um [ àmmə ríshee əm ]


noun 
Definition:
 
radioactive chemical element: a white radioactive metallic element. Source: beta decay of plutonium. Use: alpha particle source for research.
Symbol  Am
[Mid-20th century. After America]
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