Correct spelling for the English word "SDAB CDER" is [ˈɛsdˈab sˈiːdˈɜː], [ˈɛsdˈab sˈiːdˈɜː], [ˈɛ_s_d_ˈa_b s_ˈiː_d_ˈɜː] (IPA phonetic alphabet).
There is no existing definition for "SDAB CDER" in any reputable dictionary or recognized abbreviation database. The term "SDAB CDER" appears to be an acronym or abbreviation that is not widely known or recognized. It is possible that it is a specific acronym used within a certain industry, organization, or community that may not be commonly known outside of those specific circles.
In cases where an acronym or abbreviation is not listed in dictionaries, it becomes challenging to provide a precise definition without additional context or information. It is important to note that acronyms can have different meanings depending on the context in which they are used. Therefore, to best understand the meaning of "SDAB CDER," it would be helpful to provide more information about the field or context in which it is being used.