RD

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See also: rd, rd., -rd, Rd., R&D, and R & D

English

Noun

RD (countable and uncountable, plural RDs)

  1. (astronomy) Initialism of red dwarf.
  2. (US) Initialism of restricted data.
    • 1995, National Research Council, Division on Earth and Life Studies, Commission on Geosciences, Environment and Resources, A Review of the Department of Energy Classification:
      Under these restrictions, the only way for nuclear information that had been classified as RD to be controlled under UCNI is for the information to be declassified and then for circumstances to change such that the information becomes sufficiently sensitive to warrant reassertion of some degree of control.
  3. (US, uncountable) Initialism of rural delivery, formerly used when addressing mail.
  4. (professional title) Initialism of registered dietitian.
  5. (sports) Abbreviation of right defence/defense: the right wing player defensive position
  6. (US, law enforcement) Initialism of reporting district.

See also

  • (astronomy): WD, WR, PSR
  • (professional title): RDN
  • (restricted data): FRD
  • (rural delivery): RFD, RR

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