What terms are used for the following processes ?
Washing of sheep's fleece to remove dust, dirt and grease.

Answer

**Step-by-Step Solution:**

1. **Identify the Process**: The process described in the question is related to the cleaning of sheep's fleece.

2. **Understand the Purpose**: The purpose of this process is to remove dust, dirt, and grease that accumulate on the fleece before it is processed into wool.

3. **Recall the Term**: The specific term used for washing sheep's fleece to remove impurities is "scouring."

4. **Conclusion**: Therefore, the term for the process of washing sheep's fleece to remove dust, dirt, and grease is "scouring."

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