zero-dimensionalhttp://www.oed.com/dictionary/zero-dimensional_adj%3Ftab%3Dmeaning_and_usezero-dimensional, adj.
First published 2017

zero-dimensionaladjective

Mathematics.
  1. 1880–
    a. (Describing a point) having no extent in any direction; b. having a dimension (dimension n. Additions) of zero.
    1. 1880
      On arriving at zero-dimensional space, the function reduces to the simple identity Φ = 1 −1 = 0.
      American Journal of Mathematics vol. 3 5
    2. 1945
      One and the same field..can be used to reduce any of them to a zero-dimensional ideal.
      Annals of Mathematics vol. 46 404
    3. 1955
      There is also no contradiction in regarding the one-dimensional line as consisting of zero-dimensional points.
      Science Monthly November 236/1
    4. 2005
      Every zero-dimensional space is a totally disconnected Hausdorff space.
      V. Runde, Taste of Topology iii. 99
    5. 2016
      The point is zero-dimensional, whereas each line is one-dimensional and the plane is two-dimensional.
      E. Smith & H. J. Morowitz, Origin & Nature of Life on Earth v. 334 (footnote)

Originally published as part of the entry for zero, n. & adj.

zero-dimensional, adj. was first published in 2017.