commissure(redirected from Posterior commissure)
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Related to Posterior commissure: fornix, pretectal nucleus, commissura posterior
1. A line or place at which two things are joined.
a. A tract of nerve fibers passing from one side to the other of the spinal cord or brain.
b. The point or surface where two parts, such as the eyelids, lips, or cardiac valves, join or form a connection.
3. Botany The surface or place along which two structures, such as carpels, are joined.
[Middle English, from Latin commissūra, from commissus, past participle of committere, to join; see commit.]
1. (Biology) a band of tissue linking two parts or organs, such as the nervous tissue connecting the right and left sides of the brain in vertebrates
2. (Biology) any of various joints between parts, as between the carpels, leaf lobes, etc, of a plant
[C15: from Latin commissūra a joining together, from committere commit]
com•mis•sure(ˈkɒm əˌʃʊər, -ˌʃɜr)
1. a joint or seam where two parts meet, as in a bone.
2. a connecting bundle of nerve fibers, esp. one joining the right and left sides of the brain.
[1375–1425; late Middle English (< Middle French) < Latin commissūra=commiss(us) (see commissary) + -ūra -ure]
com•mis•su•ral (kəˈmɪʃ ər əl, ˌkɒm əˈʃʊər əl, -ˈʃɜr-) adj.
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|Noun||1.||commissure - a bundle of nerve fibers passing from one side to the other of the brain or spinal cord|
nerve pathway, nerve tract, pathway, tract - a bundle of myelinated nerve fibers following a path through the brain
corpus callosum - a broad transverse nerve tract connecting the two cerebral hemispheres
n. comisura, punto de unión de estructuras tal como la unión de los labios.