Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun 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.
from The Century Dictionary.
- noun Same as
chiasm .
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun anatomy A
crossing of twonerves ,ligaments etc. - noun genetics, cytology The
contact point between the twochromatids of achromosome duringmeiosis .
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun an intersection or crossing of two tracts in the form of the letter X
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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In this early poem – the first one in his Selected Poems – Heaney uses a rhetoric figure that for a considerable period would be his trademark: the 'chiasma', or crossing of themes.
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Because the optic chiasma had been cut, using their left eye they were unaware of the left half of the field of view of the screen the virtual image is reversed.
3D Avatar vs. 2D Avatar, and the Importance of Aspect Ratios | /Film 2009
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Finally, one of my favorite poetic and rhetorical tricks is the chiasma.
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ANS is largely under hypothalamic control which is situated very close to optic chiasma sixth chakra or ajna chakra.
Science Fiction, Fantasy, Horror: An Undefeated Spiritual Tag-team - Mike Resnick Blue Tyson 2008
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Shakespeare's is an interesting line, but a good chiasma is a literary firework -- an "OH!" moment -- and Bill Clinton's delivered a great one Wednesday night:
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[1890] He impressed him as a chiasma, i.e., in the form of the letter ch upon the universe.
ANF01. The Apostolic Fathers with Justin Martyr and Irenaeus 1819-1893 2001
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A chiasma so located starts its terminalization process to reach the end of the arm.
Nobel Lecture The Significance of Responses of the Genome to Challenge 1983
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It is enough to induce chromosome breakage should the terminalization process be blocked before the terminalizing chiasma reaches the end of the arm of a chromosome.
Nobel Lecture The Significance of Responses of the Genome to Challenge 1983
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The fibers thus form an X shape; and the structure is the optic chiasma (ky~az'muh), because the Greek letter "chi" looks like our X (see illustration, p. 274).
The Human Brain Asimov, Isaac 1963
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In front, the cisterna interpeduncularis extends forward across the optic chiasma, forming the cisterna chiasmatis, and on to the upper surface of the corpus callosum, for the arachnoid stretches across from one cerebral hemisphere to the other immediately beneath the free border of the falx cerebri, and thus leaves a space in which the anterior cerebral arteries are contained.
IX. Neurology. 4g. The Meninges of the Brain and Medulla Spinalis 1918
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