Share this entry

Share this page

prime vertical

Line breaks: prime ver|ti¦cal

Definition of prime vertical in English:

noun

Astronomy
A great circle in the celestial sphere passing through the zenith and the east and west points of the horizon.
Example sentences
  • Regiomontanus, however, is based upon an equal division of the equator rather than the prime vertical - it is the same method as that suggested by Morinus, but bows to convention by commencing from the ascendant.
  • For the observations closer to the meridian than the prime vertical, make the calculation of latitude with the estimated longitude.
  • For star observations a star should be selected which will be about three hours from the meridian and near the prime vertical at the times of observation.

Share this entry

Share this page

 

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day tenebrous
Pronunciation: ˈtɛnɪbrəs
adjective
dark; shadowy or obscure