1. optic nerve the cranial nerve that serves the retina
  2. acoustic nerve a composite sensory nerve supplying the hair cells of the vestibular organ and the hair cells of the cochlea
  3. sciatic nerve arises from the sacral plexus and passes about halfway down the thigh where it divides into the common peroneal and tibial nerves
  4. optimistic hopeful that the best will happen in the future
  5. outgeneral surpass in generalship
  6. cubital nerve a nerve running along the inner side of the arm and passing near the elbow; supplies intrinsic muscles of the hand and the skin of the medial side of the hand
  7. auditory nerve a composite sensory nerve supplying the hair cells of the vestibular organ and the hair cells of the cochlea
  8. octogenarian being from 80 to 89 years old
  9. motor nerve a nerve that conveys impulses toward or to muscles or glands
  10. optical device a device for producing or controlling light
  11. thoracic nerve any of twelve pairs of spinal nerves emerging from the thoracic region of the spinal cord
  12. abducens nerve a small motor nerve supplying the lateral rectus muscle of the eye
  13. phrenic nerve one of a pair of nerves that arises from cervical spinal roots and passes down the thorax to innervate the diaphragm and control breathing
  14. optic tract the cranial nerve that serves the retina
  15. abducent nerve a small motor nerve supplying the lateral rectus muscle of the eye
  16. kinetic energy the mechanical energy that a body has by virtue of motion
  17. apothecary a health professional trained in the art of preparing drugs
  18. aortic aneurysm an aneurysm of the aorta
  19. observe watch attentively
  20. optical crown optical glass of low dispersion and low refractive index