ZD
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See also: z d.
English[edit]
Noun[edit]
ZD (countable and uncountable, plural ZDs)
- 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
- z_t is now ZD (true zenith distance)
- Initialism of zero defects.
References[edit]
- Acronym Finder Accessed February 14, 2006.