/ dʒiˈɒmətri; NAmE -ˈɑːm-/ noun
1.
[ U ] the branch of mathematics that deals with the measurements and relationships of lines, angles, surfaces and solids
2.
[ sing. ] the measurements and relationships of lines, angles, etc. in a particular object or shape :
the geometry of a spider's web
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WORD ORIGIN
Middle English : via Old French from Latin geometria , from Greek , from gē earth + metria , from -metrēs measurer.