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.    From Wordnik.com.  [This Is Not a Spade: The Poetry of Seamus Heaney] Reference

Finally, one of my favorite poetic and rhetorical tricks is the chiasma.    From Wordnik.com.  [John Lundberg: The Poetry Of A Political Speech] Reference

A chiasma so located starts its terminalization process to reach the end of the arm.    From Wordnik.com.  [Nobel Lecture The Significance of Responses of the Genome to Challenge] Reference

ANS is largely under hypothalamic control which is situated very close to optic chiasma sixth chakra or ajna chakra.    From Wordnik.com.  [Science Fiction, Fantasy, Horror: An Undefeated Spiritual Tag-team - Mike Resnick] Reference

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.    From Wordnik.com.  [John Lundberg: The Poetry Of A Political Speech] Reference

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).    From Wordnik.com.  [The Human Brain]

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.    From Wordnik.com.  [3D Avatar vs. 2D Avatar, and the Importance of Aspect Ratios | /Film] Reference

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.    From Wordnik.com.  [Nobel Lecture The Significance of Responses of the Genome to Challenge] Reference

Optic chiasma (chiasma opticum; optic commissure).    From Wordnik.com.  [IX. Neurology. 4c. The Fore-brain or Prosencephalon] Reference

Within the chiasma, the optic nerves undergo a partial decussation.    From Wordnik.com.  [IX. Neurology. 5b. The Optic Nerve] Reference

We know that they are directly connected by fibres that arch round through the chiasma.    From Wordnik.com.  [Medical Essays, 1842-1882] Reference

Behind the chiasma the fibers grow backward as the optic tracts to the thalami and mid-brain.    From Wordnik.com.  [X. The Organs of the Senses and the Common Integument. 1c. The Organ of Sight] Reference

The remaining and principal part of the chiasma consists of two sets of fibers, crossed and uncrossed.    From Wordnik.com.  [IX. Neurology. 5b. The Optic Nerve] Reference

The optic chiasma is formed by the meeting and partial decussation of the fibers of the two optic nerves.    From Wordnik.com.  [X. The Organs of the Senses and the Common Integument. 1c. The Organ of Sight] Reference

—The optic tracts are continued backward and lateralward from the postero-lateral angles of the optic chiasma.    From Wordnik.com.  [IX. Neurology. 4c. The Fore-brain or Prosencephalon] Reference

A specimen of congenital absence of the optic chiasma is to be found in the Museum of the Westminister Hospital.    From Wordnik.com.  [IX. Neurology. 5b. The Optic Nerve] Reference

Pressure on the optic chiasma, for example by a tumour of the pituitary body, is associated with bilateral temporal hemianopsia.    From Wordnik.com.  [Manual of Surgery Volume Second: Extremities—Head—Neck. Sixth Edition.] Reference

They simply cross in the chiasma, and connect the medial geniculate bodies of the two sides; they form the commissure of Gudden.    From Wordnik.com.  [IX. Neurology. 5b. The Optic Nerve] Reference

The uncrossed fibers occupy the lateral part of the chiasma, and pass from the nerve of one side into the tract of the same side.    From Wordnik.com.  [IX. Neurology. 5b. The Optic Nerve] Reference

The tuber cinereum is a hollow eminence of gray substance situated between the corpora mammillaria behind, and the optic chiasma in front.    From Wordnik.com.  [IX. Neurology. 4c. The Fore-brain or Prosencephalon] Reference

The crossed fibers tend to occupy the medial side of each optic nerve, but in the chiasma and in the optic tract they are more intermingled.    From Wordnik.com.  [IX. Neurology. 4e. Composition and Central Connections of the Spinal Nerves] Reference

In the MI stage, homologous chromosomes could form bivalents by chiasma, and separase-mediated cleavage of Rec8 did not occur until the onset of AI.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

The Optic chiasma (chiasma opticum), somewhat quadrilateral in form, rests upon the tuberculum sellæ and on the anterior part of the diaphragma sellæ.    From Wordnik.com.  [IX. Neurology. 5b. The Optic Nerve] Reference

Most of its fibers have their origins in the retina, and reach the chiasma through the optic nerves, which are continuous with its antero-lateral angles.    From Wordnik.com.  [IX. Neurology. 4c. The Fore-brain or Prosencephalon] Reference

—The optic chiasma is a flattened, somewhat quadrilateral band of fibers, situated at the junction of the floor and anterior wall of the third ventricle.    From Wordnik.com.  [IX. Neurology. 4c. The Fore-brain or Prosencephalon] Reference

At the junction of the floor and anterior wall, immediately above the optic chiasma, the ventricle presents a small angular recess or diverticulum, the optic recess.    From Wordnik.com.  [IX. Neurology. 4c. The Fore-brain or Prosencephalon] Reference

The optic chiasma is formed by the meeting and partial decussation of the optic nerves, which subsequently grow backward as the optic tracts and end in the diencephalon.    From Wordnik.com.  [IX. Neurology. 2. Development of the Nervous System] Reference

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 Wordnik.com.  [The Mind and the Brain Being the Authorised Translation of L'Âme et le Corps] Reference

The Optic Tract (Fig. 774), passes backward and outward from the optic chiasma over the tuber cinereum and anterior perforated space to the cerebral peduncle and winds obliquely across its under surface.    From Wordnik.com.  [IX. Neurology. 5b. The Optic Nerve] Reference

In the optic chiasma the nerves from the medial half of each retina cross to enter the opposite optic tract, while the nerves from the lateral half of each retina pass into the optic tract of the same side.    From Wordnik.com.  [IX. Neurology. 4e. Composition and Central Connections of the Spinal Nerves] Reference