Dubnium
[doob-nee-uh m, duhb-] /ˈdub ni əm, ˈdʌb-/
noun, Chemistry, Physics.
1.
a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Db; atomic number: 105.
/ˈdʌbnɪəm/
noun
1.
a synthetic transactinide element produced in minute quantities by bombarding plutonium with high-energy neon ions. Symbol: Du; atomic no 105 See hahnium
dubnium
(db’nē-əm)
Symbol Db
A synthetic, radioactive element that is produced from californium, americium, or berkelium. Its most long-lived isotopes have mass numbers of 258, 261, 262, and 263 with half-lives of 4.2, 1.8. 34, and 30 seconds, respectively. Atomic number 105. See Periodic Table.
Read Also:
- Dubois
[dy-bwah] /düˈbwɑ/ noun 1. (Marie) Eugène (François Thomas) [ma-ree œ-zhen frahn-swa taw-mah] /maˈri œˈʒɛn frɑ̃ˈswa tɔˈmɑ/ (Show IPA), 1858–1941, Dutch physical anthropologist and anatomist. /djuːˈbwɑː/ noun 1. W(illiam) E(dward) B(urghardt). 1868–1963, US Black sociologist, writer, and political activist; a founder of the National Association for the Advancement of Colored People (NAACP) Dubois (d-bwä’) Dutch paleontologist […]
- Dubois abscesses
Dubois abscesses Du·bois abscesses (dōō-bwä’, dyōō-) pl.n. Small cysts of the thymus, especially associated with congenital syphilis. Also called thymic abscesses.
- Dubok
noun A seemingly innocent place where clandestine activity may be shielded; drop [Underworld 1970s+ fr espionage; fr Russian, ”oak tree”]
- Dubonnet
[doo-buh-ney, dyoo-] /ˌdu bəˈneɪ, ˌdyu-/ Trademark. 1. a brand of sweet, red or white, aromatized wine, used chiefly as an apéritif. noun 2. (lowercase) a deep purple-red color. adjective 3. (lowercase) of the color dubonnet. /djuːˈbɒneɪ/ noun 1. /djuːˈbɒneɪ/ noun 1. trademark a sweet usually red apéritif wine flavoured with quinine and cinchona n. sweet […]
- Dubos
[doo-bohs; French dy-baws] /duˈboʊs; French düˈbɔs/ noun 1. René Jules [ruh-ney joolz;; French ruh-ney zhyl] /rəˈneɪ dʒulz;; French rəˈneɪ ʒül/ (Show IPA), 1901–82, U.S. bacteriologist, born in France: early advocate of ecological concern. Dubos Du·bos (dōō-bôs’, -bō’, dü-), René Jules. 1901-1982. French-born American bacteriologist noted for his research on natural antibiotics, tuberculosis, and environmental factors […]