Emily Dickinson Lexicon

IT'TRI-UM, n.

better written yttrium, unless yttria should be written ittria. A brittle metal of a scaly texture, a grayish-black color, and a perfectly metallic luster. Its oxyd, called ittria or yttria, was discovered by professor Gadolin, in 1794, in a mineral found at Ytterby, in Sweden.