What is goiter ?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Thyroid Gland:**
- The thyroid gland is a butterfly-shaped endocrine gland located at the base of the neck. It plays a crucial role in regulating metabolism, growth, and development through the release of hormones.

2. **Definition of Goiter:**
- Goiter is defined as the abnormal enlargement of the thyroid gland. This enlargement can occur due to various factors, including iodine deficiency, autoimmune diseases, or other thyroid disorders.

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