[ jee-od-uh-see ]
/ dʒiˈɒd ə si /


the branch of applied mathematics that deals with the measurement of the shape and area of large tracts of country, the exact position of geographical points, and the curvature, shape, and dimensions of the earth.
Also ge·o·det·ics [jee-uh-det-iks] /ˌdʒi əˈdɛt ɪks/.

Origin of geodesy

1560–70; < French géodésie < Greek geōdaisía, equivalent to geō- geo- + daí(ein) to divide + -sia, variant of -ia -ia (generalized from stems ending in t)

Related forms

ge·od·e·sist, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for geodesist


geodetics (ˌdʒiːəʊˈdɛtɪks)

/ (dʒɪˈɒdɪsɪ) /


the branch of science concerned with determining the exact position of geographical points and the shape and size of the earth

Derived Forms

geodesist, noun

Word Origin for geodesy

C16: from French géodésie, from Greek geōdaisia, from geo- + daiein to divide
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for geodesist


[ jē-ŏdĭ-sē ]

The scientific study of the size and shape of the Earth, its field of gravity, and such varying phenomena as the motion of the magnetic poles and the tides.

Related forms

geodetic adjective
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.