What is the term given to cellular oxygen deficiency.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term that describes a condition where there is a deficiency of oxygen at the cellular level.

2. **Identifying Key Terms**: The key term to focus on is "cellular oxygen deficiency." This indicates a lack of oxygen available for cells to perform their functions.

3. **Defining Hypoxia**: The term that describes a state where tissues are not receiving enough oxygen is called "hypoxia." This condition can occur in various situations, such as high altitudes, respiratory diseases, or circulatory issues.

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