dilator
/daɪˈleɪtər/
noun
- A medical instrument used to widen a passage or opening in the body.
- She needed a dilator to help treat the narrowing in her esophagus.
- The nurse sterilized the dilator before the procedure.
- The surgeon used a dilator to gently open the patient's artery.
- A muscle that opens or widens a body part, such as the pupil of the eye.
- Certain drugs can stimulate the dilator in the eye, causing the pupil to widen.
- The doctor explained how the dilator works to control the amount of light entering the eye.
- The dilator muscle of the iris makes the pupil larger in dim light.
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