iridodilator

Causing dilation of the pupil; applied to the musculus dilator pupillae.

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iri·do·di·la·tor (ir″ĭ-do-diґla-tər) (-di-laґtər) [irido- + dilator] 1. the dilator muscle of the pupil. 2. an agent that causes dilation of the pupil of the eye.