IPA: /dʒɪˈɒməˌtɪən/
KK: /dʒiˈɒməˌtɪʃən/
A person who studies or works with shapes, sizes, and the properties of space in mathematics.
The geometrician presented his findings on the properties of triangles at the conference.
Geometrician → It is formed from "geo-" (from Greek "geō", meaning earth) and "metria" (from Greek "metron", meaning measure) and the suffix "-ian" (meaning relating to or one who). The word refers to a person who measures or studies the earth's geometry.
Think of someone who measures the 'earth' ('geo-') and its shapes or dimensions ('metria'). A geometrician is someone who specializes in the measurement of the earth.