1
Stage 1 of 3
nucleus
Latin · classical
"kernel"
'kernel', from nux 'nut'
2
Stage 2 of 3
nucleus
English · 1911
"core of the atom"
Ernest Rutherford showed at Manchester in 1911 that an atom's mass sits in a tiny central core, soon called its nucleus
3
Stage 3 of 3
nuclear
English · 1910s
"of the atomic nucleus"
'nuclear' first described cell nuclei in the 1840s; after Hiroshima in 1945 it came to mean atomic weapons and power
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