noun Chemistry, Physics.
- a transuranic element. Symbol: Md, Mv; atomic number: 101.
- a transuranic element artificially produced by bombardment of einsteinium. Symbol: Md; atomic no: 101; half-life of most stable isotope, 258 Md: 60 days (approx.); valency: 2 or 3
n.1955, Modern Latin, in honor of Dmitri Ivanovich Mendeleev. n. Symbol Md
- A synthetic radioactive element; its most stable isotope is Md 258 with a half-life of 56 days. Atomic number 101.
- A synthetic, radioactive metallic element of the actinide series that is produced by bombarding einsteinium with helium ions. Its most stable isotope is Md 258 with a half-life of approximately 51.5 days. Atomic number 101. See Periodic Table.