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WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY
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WORDNET DICTIONARY
Noun Erbium has 1 sense
- erbium(n = noun.substance) atomic number 68, er - a trivalent metallic element of the rare earth group; occurs with yttrium; is a kind of metal, metallic element
CIDE DICTIONARY
Erbium, n. [NL. from Ytterby, in Sweden, where gadolinite is found. Cf. Terbium, Yttrium, Ytterbium.].
A rare earth element of the lanthanide series associated with several other rare elements in the mineral gadolinite from Ytterby in Sweden. Symbol Er. It has atomic number 68 and an atomic weight of 167.26. The pure element is metallic with a bright, silvery luster. It is relatively stable in air, not oxidizing as quickly as some other rare earths. Its salts are rose-colored and give characteristic spectra, and the pink oxide has been added as a colorant in glass and porcelain enamel glazes. Its sesquioxide Er2O3 is called erbia . [1913 Webster]
OXFORD DICTIONARY
Erbium, n. Chem. a soft silvery metallic element of the lanthanide series, occurring naturally in apatite and xenotine.
Usage
Symb.: Er.
Etymology
mod.L f. Ytterby in Sweden