Definify.com
Webster 1913 Edition
Ytterbium
Yt-ter′bi-um
,Noun.
[NL., fr.
Ytterby
, in Sweden. See Erbium
.] (Chem.)
A rare element of the boron group, sometimes associated with yttrium or other related elements, as in euxenite and gadolinite. Symbol Yb; provisional atomic weight 173.2. Cf.
Yttrium
. ☞ Ytterbium is associated with other rare elements, and probably has not been prepared in a pure state.