Define the term 'ignition temperature?

Explanation

**Step-by-Step Text Solution:**

1. **Understanding the Term**: The term 'ignition temperature' refers to a specific temperature related to combustible substances.

2. **Definition**: Ignition temperature is defined as the lowest temperature at which a combustible substance can catch fire and start burning.

3. **Importance of Ignition Temperature**: It is crucial to note that if the temperature is below the ignition temperature, the combustible substance will not ignite, even in the presence of oxygen.

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