n. pl. ge·om·e·tries
a. The mathematics of the properties, measurement, and relationships of points, lines, angles, surfaces, and solids.
b. A system of geometry: Euclidean geometry.
c. A geometry restricted to a class of problems or objects: solid geometry.
d. A book on geometry.
a. Configuration; arrangement.
b. A surface shape.
3. A physical arrangement suggesting geometric forms or lines.
[Middle English geometrie, from Old French, from Latin geōmetria, from Greek geōmetriā, from geōmetrein, to measure land : geō-, geo- + metron, measure; see mē-2 in the Appendix of Indo-European roots.]
ge·om′e·trician (jē-ŏm′ĭ-trĭshən, jē′ə-mĭ-), ge·ome·ter n.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 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.