Who called contagium vivum fluidum and what does it stand for?

Answer

### Step-by-Step Solution:

1. **Identify the Term**: The term in question is "Contagium vivum fluidum," which is a Latin phrase.

2. **Historical Context**: This term was first suggested in the year 1898.

3. **Key Figure**: The person who coined this term is Martinus Beijerinck, a Dutch microbiologist.

4. **Meaning of the Term**: The term "Contagium vivum fluidum" translates to "contagious living fluid." It was used to describe viruses, emphasizing the idea that viruses are infectious agents that can be transmitted like a fluid.

5. **Conclusion**: Therefore, Martinus Beijerinck called it "Contagium vivum fluidum," which stands for "contagious living fluid," referring to the nature of viruses.