SEDT is an initialism that may refer to: School of Entertainment and Design Technology at Miami Dade College School of Environmental Development Technology at Federal Polytechnic, Nekede sedt, a Unix text editor based on EDT (Digital) Sequential Euclidean distance transform, a distance transform using Euclidean distance, computed sequentially Single-ended double truck, a configuration of train rolling stock used for instance in the Toronto Suburban Railway Spondyloepiphyseal dysplasia tarda, a rare skeletal disease associated with the TRAPPC2 gene