dubnium

/doob-nee-uhm, duhb-/US // ˈdub ni əm, ˈdʌb- //UK // (ˈdʌbnɪəm) //

曙光,曙光号,曙光乍现

Definitions

n.名词 noun

1
Chemistry, Physics.
- : a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Db; atomic number: 105.