| element 112 n. An artificially produced radioactive element with atomic number 112 whose isotope has a mass number of 277 and a half-life of 280 milliseconds. Also called ununbium. |
un·un·bi·um (ə-nŭn'bē-əm) n. Symbol Uub See element 112. [Latin ūnus, one; see union + Latin ūnus + Latin bi-, bi- + -ium.] |
| ununbium (ə-nŭn'bē-əm) Pronunciation Key
See element 112. |