- The act of leading, bringing, conducting.
- In ophthalmology, ocular rotations with reference to one eye; usually additionally designating direction of movement of the eye; rotation toward the nose, adduction; toward the temple, abduction; upward, supra- or sursumduction; downward, deorsumduction; of the upper pole of one cornea, cycloduction; of the upper pole of one cornea outward, excycloduction; of the upper pole of one cornea inward, incycloduction.
[L. duco, to lead]
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