n. pl. hyp·sog·ra·phies
a. The scientific study of the earth's topologic configuration above sea level, especially the measurement and mapping of land elevations.
b. A representation or description of the earth's topologic features above sea level, as on a map.
hyp′so·graphic (hĭp′sə-grăfĭk), hyp′so·graphi·cal adj.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. 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.