GALLIUM
gallium, Ga, atomic number
(noun) a rare silvery (usually trivalent) metallic element; brittle at low temperatures but liquid above room temperature; occurs in trace amounts in bauxite and zinc ores
Source: WordNet® 3.1
Etymology
Noun
gallium (uncountable)
A chemical element (symbol Ga) with an atomic number of 31; a soft bluish metal.
Synonym: eka-aluminium (name given by Dmitri Mendeleev to the then undiscovered element at the position of gallium in his periodic table)
Source: Wiktionary
Gal"li*um, n. Etym: [NL., fr. L. Gallia France.] (Chem.)
Definition: A rare metallic element, found in certain zinc ores. It is
white, hard, and malleable, resembling aluminium, and remarcable for
its low melting point (86
Note: The element was predicted with most of its properties, under
the name ekaluminium, by the Russian chemist Mendelejeff, on the
basis of the Periodic law. This prediction was verified in its
discovery by the French chemist Lecoq de Boisbaudran by its
characteristic spectrum (two violet lines), in an examination of a
zinc blende from the Pyrenees.
Source: Webster’s Unabridged Dictionary 1913 Edition