Try Our Apps


World Series Quiz


[ruhth-er-fawr-dee-uh m, -fohr-, ruhth-] /ˌrʌð ərˈfɔr di əm, -ˈfoʊr-, ˌrʌθ-/
noun, Chemistry, Physics.
a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Rf; atomic number: 104.
Formerly unnilquadium, element 104.
Origin of rutherfordium
1969; named after English physicist Ernest Rutherford; see -ium Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
Cite This Source
British Dictionary definitions for rutherfordium


a transactinide element produced by bombarding californium-249 nuclei with carbon-12 nuclei. Symbol: Rf; atomic number.: 104; atomic wt: 261 Name in the former Soviet Union kurchatovium
Word Origin
C20: named after Ernest Rutherford
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
rutherfordium in Science
Symbol Rf
A synthetic, radioactive element that is produced by bombarding plutonium with carbon or neon ions. Its most stable isotope is Rf 261 with a half-life of 62 seconds. Atomic number 104. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Difficulty index for rutherfordium

Few English speakers likely know this word

Word Value for rutherfordium

Scrabble Words With Friends

Nearby words for rutherfordium