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chiasma
[ kahy-az-muh ]
noun
plural chiasmas, chiasmata
- Anatomy. a crossing or decussation, as that of the optic nerves at the base of the brain.
- Cell Biology. a point of overlap of paired chromatids at which fusion and exchange of genetic material take place during prophase of meiosis.
chiasma
/ ka瑟藞忙zm蓹; 藞ka瑟忙z蓹m /
noun
- cytology the cross-shaped connection produced by the crossing over of pairing chromosomes during meiosis
- anatomy the crossing over of two parts or structures, such as the fibres of the optic nerves in the brain
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Derived Forms
- 肠丑颈藞补蝉尘补濒, adjective
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Other 亚洲网紅露点 Forms
- 肠丑颈路补蝉顎僲补濒 肠丑颈路补蝉顎僲颈肠 肠丑颈路补蝉路尘补迟路颈肠 [kahy-az-, mat, -ik], adjective
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亚洲网紅露点 History and Origins
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亚洲网紅露点 History and Origins
Origin of chiasma1
C19: from Greek khiasma wooden crosspiece, from khiazein to mark with an X, from khi chi 1
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Example Sentences
Examples have not been reviewed.
Pressure on the optic chiasma, for example by a tumour of the pituitary body, is associated with bilateral temporal hemianopsia.
From
The movement follows the course of the optic nerve, traverses the chiasma, goes along the fascia, passes the internal capsule, and finally arrives at the visual centres of the occipital region.
From
They have an arterial cone and bulb, spiral intestinal valve, and the optic nerves united by a chiasma.
From
We know that they are directly connected by fibres that arch round through the chiasma.
From
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