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unnilpentium

[yoo-nil-pen-tee-uh m] /ˌyu nɪlˈpɛn ti əm/
noun, Chemistry, Physics.
1.
a former name of dubnium. Symbol: Unp.
Also called element 105.
Formerly hahnium.
Origin of unnilpentium
1975-1980
1975-80; < Latin ūn(us) one + nīl nothing + Greek pént(e) five + New Latin -ium -ium
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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