Feng shui.

In terms of geomancy.

(geometry) The single (up to logical equivalence) geometry whose axiomatic system is equivalent to that of Euclidean geometry without the parallel postulate or any alternative.

(algebraic geometry) A field of algebraic geometry in which the aim is to determine under what conditions two algebraic varieties are isomorphic outside lower-dimensional subsets.

(mathematics) The study of complex manifolds, complex algebraic varieties, and functions of several complex variables. / (countable) Used other than figuratively or idiomatically: see complex, geometry.

(geometry, uncountable) The field of mathematics which examines extremal problems of a combinatorial nature expressed geometrically. / (geometry, theory of matroids, countable) A simple matroid.

(computer science, geometry) A field of study, within computer science, devoted to algorithms that solve problems formulated in geometric terms.

(geometry) The study of conformal (angle-preserving) transformations on a space; / (formally) an ordered pair comprising a space and the group of conformal transformations that act on the space.

(differential geometry, countable) Given a smooth manifold of odd dimensionality, a distribution (subset) of the tangent bundle that satisfies the condition of complete nonintegrability, or equivalently may be locally defined as the kernel of a maximally nondegenerate differential 1-form;

(number theory) The subbranch of number theory which applies techniques from geometry to the study of algebraic numbers.