Define cyclosis.

Explanation

**Step-by-Step Solution:**

1. **Understanding Cyclosis**: Cyclosis refers to the movement of the cytoplasm within a cell. It is characterized by a spinning or circulating motion.

2. **Defining Cytoplasm**: Before fully defining cyclosis, it is important to understand what cytoplasm is. Cytoplasm is the semi-fluid matrix found within the cell, which occupies the majority of the cell's volume.

3. **Linking Cytoplasm to Cyclosis**: The spinning movement of the cytoplasm is what we specifically refer to as cyclosis. This movement is crucial for various cellular processes, including the distribution of nutrients and organelles within the cell.

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