Chiasm is present when a passage has a sandwich-like structure For example, Psalm 26 is chiastic In this psalm, walking in integrity and fidelity are found in v 1-3 and v 11-12, and temple and ungodly appear in vv 4-5 and vv 8-10 Vv 6-7 tell of a different idea This psalm might be pictured as a sandwich: bread on the outside, buttered, with cheese in the centre The structure can be represented schematically as A-B-C-B-A Other structures also occur in the Bible
Crossing of visual fibers as they head toward the opposite side of the brain For each optic nerve most of the visual fibers cross to the opposite side, some run directly backward on each side without crossing
Literary structure that can be seen as x-shaped (the shape of the Greek letter chi, hence the name), for example a-b-c-b'-a' where a and a', b and b' are in some way parallel or related For example, in Jeremiah 4: 5a "Declare in Judah, and proclaim in Jerusalem" (NRSV), the structure reads as a-b-a'-b' but in the original Hebrew the word order is "declare in Judah, and in Jerusalem proclaim" which is chiastic (a-b-b'-a')
() Latin; in sense 1, from chiasma, from Ancient Greek χίασμα (khiasma); in sense 2, from chiasmus, from Ancient Greek χιασμός (khiasmos "crossing, diagonal arrangement")