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| the expanding and contracting opening in the iris of the eye, through which light passes to the retina |
| the thighbone of the human leg, extending from the pelvis to the knee, that is the longest, largest, and strongest in the body |
recurrent re·cur·rent (rĭ-kûr'ənt, -kŭr'-)
adj.
Occurring or appearing again or repeatedly.
Turning in a reverse direction. Used of blood vessels and nerves.