Definition of Gallium 1. 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 Noun Synonyms for word "gallium" Semanticaly linked words with "gallium" Hyponims for word "gallium" has derived form Gallic etymology galliferous etymology radiogallium etymology ガリウム [Japanese] etymology galium etymological origin of Gallia [Latin] is derived from aluminium gallium arsenide is derived from aluminium gallium nitride is derived from aluminum gallium arsenide is derived from aluminum gallium nitride is derived from copper indium gallium selenide is derived from gallane is derived from gallium arsenide is derived from gallium arsenide phosphide is derived from gallium citrate is derived from gallium gadolinium garnet is derived from gallium nitrate is derived from gallium nitride is derived from indium gallium nitride