chiasma
pronunciation
How to pronounce chiasma in British English:
UK [kaɪ'æzmə]
How to pronounce chiasma in American English:
US [kaɪ'æzmə]
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- Noun:
- an intersection or crossing of two tracts in the form of the letter X
Word Origin
- chiasma (n.)
- "a crossing," 1832, medical Latin, from Greek khiasma "two things placed crosswise," which is related to khiasmos (see chiasmus). In cytology from 1911.
Example
- 1. The chiasmata can slip off the ends of the bivalents , and thus chiasma frequency may be reduced by terminalization .
- 2. But here , too , chiasma is to be found , since it is this last field , supposedly created to perceive things in diminished lighting , which provides the maximum possibility of perceiving the effects of light .
- 3. Methods 80 adult cadaveric heads were dissected to study the shapes of optic chiasma and its neighbouring hypophyses , internal carotid artery and its blood-supplying arteriolae and the surrounding areas .
- 4. Conclusion the compression of optic nerves and optic chiasma is responsible for different types of visual field defects caused by saddle area tumors .
- 5. Objective to provide morphological evidences for visual field defects caused by the compression of optic nerves and optic chiasma by saddle area tumors .