yttrium

• POS: Noun
• HYPHEN: yt=tri=um

CIDE DICTIONARY

yttrium, n. [NL., from Ytterby, in Sweden. See Erbium.].

 A rare metallic element of the boron-aluminium group, found in gadolinite and other rare minerals, and extracted as a dark gray powder. Symbol Y. Atomic number 39. Atomic weight, 88.9.  [1913 Webster]
" Associated with yttrium are certain rare elements, as erbium, ytterbium, samarium, etc., which are separated in a pure state with great difficulty. They are studied by means of their spark or phosphorescent spectra. Yttrium is now regarded as probably not a simple element, but as a mixture of several substances."  [1913 Webster]

OXFORD DICTIONARY

yttrium, n. Chem. a greyish metallic element resembling the lanthanides, occurring naturally in uranium ores and used in making superconductors.

Usage

Symb.: Y.

Etymology

formed as YTTERBIUM