S.M. Lond. Soc., Societatis Medicæ Londiniensis Socius=Member of the London Medical Society.
S.M.M., Sancta Mater Maria=Holy Mother Mary.
s.m.p., sine mascula prole=Without male issue.
s.n., secundum naturam=According to nature.
S.O. Sub-office.
s.o. Seller's option.
Soc. Society.
sol. Solution.
Sol., Solr. Solicitor.
Sol.-gen. Solicitor-general.