from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A mounting for astronomical telescopes that permits both horizontal and vertical rotation.
  • n. A telescope having such a mounting.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A telescope or surveying instrument that has a mount permitting both horizontal and vertical rotation

from the GNU version of the Collaborative International Dictionary of English

  • n. An instrument for taking azimuths and altitudes simultaneously.

from The Century Dictionary and Cyclopedia

  • n. An astronomical instrument for determining the altitudes and the azimuths of heavenly bodies.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. an instrument that measures the altitude and azimuth of celestial bodies; used in navigation


alt(itude) + azimuth.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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