roof of mouth development secondary palate development biological_process The biological process whose specific outcome is the progression of the secondary palate from an initial condition to its mature state. This process begins with the formation of the structure and ends with the mature structure. The secondary palate is the part of the palate formed from the fusion of the two palatine shelves, extensions of the maxillary prominences. 2018-02-26T22:55:20Z dph GO:0062009