WordNet
optic chiasma
n. the crossing of the optic nerves from the two eyes at the base of the brain [syn: optic chiasm, chiasma opticum]
Usage examples of "optic chiasma".
Though he lacked the faith to truly enjoy the pain of the neural grub's detachment, he feigned a smile of satisfaction as the thing tore its dendrites from his optic chiasma and exited through his nasal cavity.
There was a small concavity above his left ear, just enough to compress the temporal lobe back into the hy-pothalamus and optic chiasma.
He was interested in the fact that they have an optic chiasma, the same as the higher vertebrates.