NEPTUNIUM
neptunium, Np, atomic number
(noun) a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium
Source: WordNet® 3.1
Etymology
Noun
neptunium (uncountable)
The transuranic chemical element with atomic number 93 and symbol Np.
Source: Wiktionary
Nep*tu"ni*um, n. Etym: [NL.]
Definition: A new metallic element, of doubtful genuineness and uncertain indentification, said to exist in certain minerals, as columbite. Hermann.
Source: Webster’s Unabridged Dictionary 1913 Edition
Word of the Day
19 November 2024
SALTWORT
(noun) bushy plant of Old World salt marshes and sea beaches having prickly leaves; burned to produce a crude soda ash
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