What is polymorphous?

Explanation

### Step-by-Step Text Solution:

1. **Definition of Polymorphous**:
- Polymorphous refers to a single substance that can crystallize into two or more distinct structural forms.

2. **Explanation of the Phenomenon**:
- The phenomenon where a substance can exist in multiple forms is known as polymorphism. This means that the same chemical compound can have different physical forms or arrangements in its solid state.

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