s.d.

/S D/
noun
  1. 1

    (law) Initialism of South Dakota: a state of the United States, as used in case citations. [A state in the Upper Midwest region of the United States. Capital: Pierre. Largest city: Sioux Falls.]

  2. 2

    (law) Abbreviation of Southern District Used in case citations to identify courts, particularly United States Federal courts designated to cover the southern part of a multi-district state.

  3. 3

    (education) Initialism of Doctor of Science. [An academic research degree awarded in a number of countries throughout the world. (Latin: Scientiæ Doctor)]