Thermometer is a medicine in first aid kit.

Explanation

**Step-by-Step Solution:**

1. **Understand the Statement**: The statement in question is "Thermometer is a medicine in first aid kit." We need to analyze whether this statement is true or false.

2. **Define a Thermometer**: A thermometer is a device used to measure temperature. It is commonly used to check a person's body temperature to determine if they have a fever.

3. **Identify the Nature of a Thermometer**: Since a thermometer is an instrument and not a substance that treats or prevents illness, it does not qualify as a medicine.

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