negatively regulates negative regulation of embryonic development dermatome development regulation of dermatome development negative regulation of dermatome development biological_process GO:0061185 2010-07-14T08:43:08Z Any process that decreases the rate, frequency, or extent of the progression of the dermatome over time, from its initial formation to the mature structure. The dermatome is the portion of a somite that will form skin. biological regulation