S.D., salutem dicit=Sends greeting.
s.d., sine die=Without day.
S.D.U.K. Society for the Diffusion of Useful Knowledge.
S.E. South-east.
sec. Second; Section.
Sec., Secy. Secretary.
sec. leg., secundum legem= According to law.
sec. reg., secundum regulam= According to rule.
sect. Section.
Sem. Seminary; Semitic.