geodesy noun.
[dʒɪ'ɒdɪsi] L16.[mod. Latin geodaesia from Greek geōdaisia, from daiein divide: see GEO-, -Y3.]Orig., land surveying. Now, the branch of mathematics that deals with the shape and area of the earth or of large parts of it.
■ geodesist noun M19. [TahlilGaran] English Dictionary ▲