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Latin secare, sectum (to cut).


sectant (plural sectants)

  1. One of the portions of space bounded by the three coordinate planes.
  2. (crystallography) One of the parts of a crystal into which it is divided by the axial planes.

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for sectant in
Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.)