1955, Modern Latin, in honor of Dmitri Ivanovich Mendeleev.
mendelevium men·de·le·vi·um (měn'də-lē'vē-əm)
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.