Chiasma definition
(anatomy) A crossing or intersection of two tracts, as of nerves or ligaments.
noun
(genetics) The point of contact between paired chromatids during meiosis, resulting in a cross-shaped configuration and representing the cytological manifestation of crossing over.
noun
A crossing or intersection of the optic nerves in the hypothalamus of the brain.
noun
A point of contact between chromosomes during meiosis where two chromatids interchange corresponding segments.
noun
Any crosswise function.
noun
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(anatomy) A crossing or intersection of two tracts, as of nerves or ligaments.
noun
(genetics) The point of contact between paired chromatids during meiosis, resulting in a cross-shaped configuration and representing the cytological manifestation of crossing over.
noun
noun
Alternative Forms
Alternative Form of chiasma -
chiasm
Other Word Forms
Noun
Singular:
chiasma
Plural:
chiasmas, chiasmataOrigin 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