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Medical Definition of Ganglionic crest
1. A group of embryonic cells that separate from the neural plate during neurulation and migrate to give several different lineages of adult cells: the spinal and autonomic ganglia, the glial cells of the peripheral nervous system and nonneuronal cells, such as chromaffin cells, melanocytes and some haemopoietic cells. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)