What is meant by degree of polymerization ?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Concept**: The degree of polymerization (DP) is a fundamental concept in polymer chemistry that indicates the size of a polymer chain. It tells us how many repeating units (monomers) are present in a polymer.

2. **Definition**: The degree of polymerization is defined as the ratio of the total mass of the polymer to the mass of one monomer unit. Mathematically, it can be expressed as:
\[ \text{Degree of Polymerization (DP)} = \frac{\text{Mass of Polymer}}{\text{Mass of Monomer Unit}} \]
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