What is another term used for water potential earlier?

Explanation

**Step-by-Step Solution:**

1. **Understanding Water Potential**: Water potential is a measure of the potential energy of water in a system. It indicates the tendency of water to move from one area to another. Pure water has the highest water potential, while the addition of solutes decreases the water potential.

2. **Historical Term for Water Potential**: The question specifically asks for another term that was used for water potential in the past.

3. **Identifying the Earlier Term**: The earlier term used for water potential is "Diffusion Pressure Defect," abbreviated as DPD.

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