`"________"` is a disease that occurs when cells divide uncontrollably.

Explanation

The answer to the question is: **Cancer**.

### Step-by-Step Solution:

1. **Understanding Cell Division**: Cells in our body have a regulated process of division that is essential for growth, repair, and development. This process is typically controlled by various mechanisms.

2. **Contact Inhibition**: One of the key mechanisms that regulate cell division is known as contact inhibition. This is the property of cells to stop dividing when they come into contact with neighboring cells. This helps to prevent overcrowding and ensures that cells only divide when necessary.

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