(n.) A new metallic element, of doubtful genuineness and uncertain indentification, said to exist in certain minerals, as columbite.
NEPTUNIUM
Meaning of NEPTUNIUM in English
Webster's English dictionary. Английский словарь Webster. 2012
(n.) A new metallic element, of doubtful genuineness and uncertain indentification, said to exist in certain minerals, as columbite.
Webster's English dictionary. Английский словарь Webster. 2012