(physics) geometrical optics

base, basis, foundation, ground, root / (construction, architecture) foundation

formation / Short for 形成手術.

form, take form

(mathematics) geometric mean, specifically, if the variables a, b, c satisfy the relation a:b=b:c, then b is the 幾何中項 of a and c.

(geometry) construction, especially using tools such as ruler and compass

(organic chemistry, dated, deprecated by IUPAC) geometric isomer: a molecule that exhibits geometric isomerism

linguistics

astronomy

physics (as an area of study)