ster·e·o·tax·is (stĕr′ē-ə-tăksĭs, stîr′-) also ster·e·o·tax·y (stĕrē-ə-tăk′sē, stîr-)
A method in neurosurgery and neurological research for locating points within the brain using an external, three-dimensional frame of reference usually based on the Cartesian coordinate system.
ster′e·o·tactic (-tăktĭk), ster′e·o·taxic (-tăksĭk), ster′e·o·tacti·cal (-tăktĭ-kəl), ster′e·o·taxi·cal (-tăksĭ-kəl) adj.
ster′e·o·tacti·cal·ly, ster′e·o·taxi·cal·ly adv.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.