(mathematics) Riemannian geometry

(mathematics) intuitive geometry, study of properties in geometry based on intuition, using methods such as observation, measurements, and drawing.

(mathematics) study of properties in geometry based on arguments and proofs instead of intuition.

(physics) geometrical optics

Synonym of 黄昏 (tasogare, “dusk; twilight”) / Synonym of 黄昏時 (tasogaredoki, “dusk; twilight”)

(geometry, mathematics) Euclidean geometry

(mathematics) geometrical

algebraic geometry

topology (study of geometric properties that are not changed by stretching etc.)

(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.