Dorsal horn of the spinal cord - definition
aka posterior horn; one of the divisions of the grey matter of the spinal cord, the dorsal horn contains interneurons that make connections within the spinal cord as well as neurons that enter ascending sensory pathways. It contains the substantia gelatinosa.
Learn more:
2-Minute Neuroscience: Spinal Cord Cross-Section
Posterior horn (aka dorsal horn) of the spinal cord.