astatine

noun
as·​ta·​tine | \ˈas-tə-ˌtēn \

Definition of astatine 

: a radioactive halogen element discovered by bombarding bismuth with alpha particles and also formed by radioactive decay — see Chemical Elements Table

First Known Use of astatine

1947, in the meaning defined above

History and Etymology for astatine

Greek astatos unsteady, from a- + statos standing, from histanai to cause to stand — more at stand

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The first known use of astatine was in 1947

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astatine

noun
as·​ta·​tine | \ˈas-tə-ˌtēn \

Medical Definition of astatine 

: a radioactive halogen element discovered by bombarding bismuth with helium nuclei and also formed by radioactive decay symbol At

called also ekaiodine

— see Chemical Elements Table

More from Merriam-Webster on astatine

Britannica.com: Encyclopedia article about astatine

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