a branch of mathematics that deals with the measurement, properties, and relationships of points, lines, angles, surfaces, and solids
a particular type or system of geometry
a surface shape, e.g. of a crystal
an arrangement of objects or parts that suggests geometrical figures
geometrician /-ʹtrish(ə)n/ noun
[Middle English geometrie via French and Latin from Greek geōmetria, from geōmetrein to measure the earth, from gē earth + metron measure]