YTTERBIUM

ytterbium, Yb, atomic number

(noun) a soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotime

Source: WordNet® 3.1

Etymology

Noun

ytterbium (usually uncountable, plural ytterbiums)

A metallic chemical element (symbol Yb) with an atomic number of 70.

A single atom of this element.

Synonyms

• aldebaranium (name proposed by Baron Carl Auer von Welsbach, who isolated ytterbium and lutetium from ytterbia around 1907, which was later rejected)

• neoytterbia (former name)

Source: Wiktionary

Yt*ter"bi*um, n. Etym: [NL., fr. Ytterby, in Sweden. See Erbium.] (Chem.)

Definition: 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.

Note: Ytterbium is associated with other rare elements, and probably has not been prepared in a pure state.

Source: Webster’s Unabridged Dictionary 1913 Edition