darm·stadt·i·um (därm shtät  - m)n. Symbol Ds An artificially produced radioactive element with atomic number 110 and a mass number of 281, whose most stable isotope has a half-life of over one minute. See Table at element. [After Darmstadt.] |
| darmstadtium (därmshtät-m) Symbol Ds A synthetic radioactive element, first produced by bombarding lead atoms with nickel atoms. The isotope first synthesized has a mass number of 269 and a half-life of 0.18 milliseconds. Atomic number 110. See Periodic Table. |
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| Noun | 1. | darmstadtium - a radioactive transuranic element chemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter |
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