ZD

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See also: z d.

English

Noun

ZD (countable and uncountable, plural ZDs)

  1. Initialism of zenith distance.
    z_t is now ZD (true zenith distance)
    --California Institute of Technology
    limit in zenith distance ZD: ZD < 70°
    --European Southern Observatory
  2. Initialism of zero defects.

References

Anagrams