D- means: * Placed before a

U.S. state In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its sove ...

, usually in parentheses, indicates the person it applies to is a

Democratic Party Democratic Party most often refers to: *Democratic Party (United States) Democratic Party and similar terms may also refer to: Active parties Africa *Botswana Democratic Party *Democratic Party of Equatorial Guinea *Gabonese Democratic Party *Demo ...

politician of that state. "R-" is used for the Republican Party. * An academic grade given by certain institutions. Slightly better than an F and slightly worse than a D. See

Grade (education) Grading in education is the process of applying standardized measurements for varying levels of achievements in a course. Grades can be assigned as letters (usually A through F), as a range (for example, 1 to 6), as a percentage, or as a numbe ...

. * A prefix signifying chirality of a molecule

See also