Chiasma meaning

kī'ăz'əm
A crossing or intersection of two tracts, as of nerves or ligaments.
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The point of contact between paired chromatids during meiosis, resulting in a cross-shaped configuration and representing the cytological manifestation of crossing over.
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A crossing or intersection of the optic nerves in the hypothalamus of the brain.
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A point of contact between chromosomes during meiosis where two chromatids interchange corresponding segments.
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Any crosswise function.
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A crossing or intersection of two tracts, as of nerves or ligaments.
noun
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The point of contact between paired chromatids during meiosis, resulting in a cross-shaped configuration and representing the cytological manifestation of crossing over.
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(anatomy) A crossing of two nerves, ligaments etc.
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(genetics, cytology) The contact point between the two chromatids of a chromosome during meiosis.
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Origin of chiasma

  • Greek khīasma cross-piece from khīazein to mark with an X from khei, khī chi (from the letter's shape)
    From American Heritage Dictionary of the English Language, 5th Edition
  • Modern Latin, from Ancient Greek χίασμα (khiasma), from χίαζειν (khiazein, “to mark with the letter chi”).
    From Wiktionary