资料来源 : pyDict

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资料来源 : Webster's Revised Unabridged Dictionary (1913)

Gallium \Gal"li*um\, n. [NL.; perh. fr. L. Gallia France.]
   (Chem.)
   A rare metallic element, found combined in certain zinc ores.
   It is white, hard, and malleable, resembling aluminium, and
   remarkable for its low melting point (86[deg] F., 30[deg]
   C.). Symbol, Ga; at. wt., 69.9. Gallium is chiefly trivalent,
   resembling aluminium and indium. It was predicted with most
   of its properties, under the name eka-aluminium, by
   Mendelyeev on the basis of the periodic law. This prediction
   was verified in its discovery (in 1875) by its characteristic
   spectrum (two violet lines).

Gallium \Gal"li*um\, n. [NL., fr. L. Gallia France.] (Chem.)
   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? F., 30?C). Symbol
   Ga. Atomic weight 69.9.

   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.

资料来源 : WordNet®

gallium
     n : 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 [syn: {Ga},
          {atomic number 31}]