overvoltage noun. ['ǝʊvǝvǝʊltɪdʒ, -vɒlt-] E20.
[from OVER- + VOLTAGE.]
1. A voltage in excess of some threshold value, or of that which is normal, safe, or allowed for. E20.

2. Chemistry. The extra potential above the theoretical value which must be applied to an electrolytic cell to liberate a substance at an electrode. E20.

[TahlilGaran] English Dictionary ▲