Definition of optic chiasma in English:

optic chiasma

Syllabification: op·tic chi·as·ma

noun

(also optic chiasm) Anatomy
  • The X-shaped structure formed at the point below the brain where the two optic nerves cross over each other.
    More example sentences
    • Nerve trunks from the two eyes carry the signals from each eye to the optic chiasma, a crossing over point located a few centimeters back from the eyes.

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Pronunciation: ˌkɒlərəˈtjʊərə
noun
elaborate ornamentation of a vocal melody