- A chemical element whose atomic number is 31. It is a silvery-white solid metal which, upon heating slightly becomes a liquid with a striking silver color. It possesses a very wide temperature range as a liquid, is not particularly chemically reactive, and has about 25 known isotopes, of which 2 are stable. Its applications in electronics include its use as a semiconductor dopant, in lasers, light-emitting diodes, photocells, and in low-melting point alloys. Its chemical symbol is Ga.
- chemical symbolGa
- noun a metallic element a radioisotope of which is used to detect tumours or other tissue disorders