Final answer:
The combining form 'mi(o)' in the term 'miotic' refers to miosis, which is the constriction of the pupil of the eye, commonly discussed in medical and ophthalmology contexts.
Step-by-step explanation:
In the term miotic, the combining form 'mi(o)' refers to anything related to or causing miosis, which is the contraction of the pupil of the eye. This term is often used in medical contexts, especially in ophthalmology when discussing drugs or conditions that induce the constriction of the pupils, as opposed to mydriatic agents which cause pupil dilation.