(climatology) Large-scale components of the Earth climate system that may pass a tipping point.

(algebra) An element of a ring that is not a zero divisor.

(linguistics) An element of morphological analysis, usually carrying no meaning, used to connect words or stems to form compounds.

Alternative form of omnielemental

(astronomy) One of the parameters needed to uniquely specify a particular orbit.

(algebra) An element of an algebraic structure which when applied, in either order, to any other element via a binary operation yields the other element.

(chemistry) A chemical element present in a sample in very small quantities.

(chemistry) Any one of the simplest chemical substances that cannot be decomposed in a chemical reaction. Chemical elements consist of atoms which have the same number of protons.

(chemistry) Any of the group of metallic elements that have an incomplete inner (d) electron shell, having multiple valencies and forming coloured compounds and stable complex ions; the elements from scandium through copper, and those lying below them in the periodic table.

(linear algebra) An element on the main diagonal of a square matrix, that is, an element in row k and column k where k is an integer between 1 and the number of rows (or columns) in the matrix.