a metal of the rare earth group of elements. a radioactive form of yttrium may be attached to a monoclonal antibody or other molecule that can locate and bind to cancer cells and be used to diagnose or treat some types of cancer.
出典:Wiktionary
Ytterby + -ium, named after Ytterby, Sweden, the same etymological source as terbium, erbium, and ytterbium.
yttrium (usually uncountable, 複数形 yttriums)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/28 01:01 UTC 版)
Yttrium ( /ˈɪtriəm/ it-ree-əm) is a chemical element with symbol Y and atomic number 39. It is a silvery-metallic transition metal chemically similar to the lanthanides and it has often been classified as a "rare earth element". Yttrium is almost always found combined with the lanthanides in rare earth minerals and is never found in nature as a free element. Its only stable isotope, 89Y, is also its only naturally occurring isotope.