rutherford /rudhˈər-fərd/

A unit of radioactive disintegration, equal to a million disintegrations a second (abbrev rd)

rutherfordˈium noun

1. An artificially produced radioactive transuranic element (symbol Rf; atomic no 104), formerly called unnilquadium, dubnium, and by the Russians kurchatovium
2. A former name for seaborgium

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