Define the term used in metallurgy.
Electrolytic reduction

Explanation

**Step-by-Step Solution:**

1. **Definition of Electrolytic Reduction:**
- Electrolytic reduction is a metallurgical process used for extracting highly reactive metals from their ores through the application of electrical energy.

2. **Understanding the Process:**
- In metallurgy, the extraction of metals can be achieved through various methods, and electrolytic reduction is specifically used for metals that are too reactive to be extracted through traditional methods like roasting or reduction with carbon.

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