an optical microscope

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

experimental study

(mathematics) geometrical

(geometry, mathematics) Euclidean geometry

(mathematics, geometry) Riemannian geometry

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

algebraic geometry

(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