(idiomatic) The strategic advantage afforded to a party when its opposition may be caught by surprise.

(category theory) A morphism from the terminal object to a given object (to which it is said to belong).

(algebra, commutative algebra, ring theory) Given a commutative unital ring R with extension ring S (i.e., that is a subring of S), any element s ∈ S that is a root of some monic polynomial with coefficients in R.

(algebra, field theory) An element that generates a simple extension.

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

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

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

Alternative form of omnielemental

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

(chemistry) A systematic name for an element, derived from the digits of its atomic number to which the suffix -(i)um is appended; normally only used for transuranic elements before or for a short period after they have been created, after which they will be given a non-systematic name.