You searched for: “chiasma
chiasma (s) (kigh AZ muh) (noun), chiasmata (kigh AZ muh tuh) (pl)
1. A crossing; two things placed cross-wise.
2. In anatomy, the crossing over of body parts; any crossing over of biological tissue.
3. A crossing or intersection of the optic nerves on the ventral surface of the brain.
4. Etymology: Mid-19th century via modern Latin from Greek khiasma, "crosspiece", from khiazein, "mark with an X"; from khi, "the (Greek) letter chi".
This entry is located in the following units: chi; Χ, χ + (page 1) chiasto-, chiasm- + (page 1)