# thyroid

/ˈθaɪɹɔɪd/ (US) · /θˈaɪɹɔɪd/ (UK)

Source: https://englishreference.com/word/thyroid
Updated: 2026-06-20

## Senses

### 1. the gland

noun · CEFR B2

a small gland in the front of your neck that produces hormones to control your metabolism and energy levels.

For teachers: the thyroid gland, an endocrine gland located in the neck that regulates metabolic rate through the secretion of hormones.

- The doctor ordered a blood test to check if her thyroid was working properly.
- Patients with an overactive thyroid often experience rapid weight loss and increased heart rate due to the accelerated metabolic state.

### 2. relating to the gland

adjective · CEFR C1 · Technical

relating to the thyroid gland or the hormones it makes.

For teachers: pertaining to the thyroid gland, its function, or its associated anatomical structures.

- She is taking thyroid medication to help with her energy levels.
- The surgeon carefully avoided the thyroid cartilage while performing the delicate procedure on the patient's throat.

## Examples

- The doctor checked her thyroid for any swelling.
- She visited the clinic because her thyroid levels were affecting her weight and energy.
- An underactive thyroid can cause fatigue and weight gain, while an overactive one often leads to anxiety and rapid heartbeat.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.