(spirituality) A number or sequence of numbers that a person frequently notices in the world around them, believed to be a message from benevolent angels.

(Britain, informal) A job or task that is easy to do; a position that requires little work or is undemanding; a sinecure.

A sequential identification code on the edge of film, used to locate individual frames when working with sections of the film.

plural of edge number

plural of epsilon number

(set theory) Any (necessarily transfinite) ordinal number α such that ω^α = α; (by generalisation) any surreal number that is a fixed point of the exponential map x → ωˣ.

(algebra) split-complex number

(mathematics, education) An equation or inequality expressed with numbers and operators, such as 3 + 6 < 10.

plural of number sentence

(mathematics) A number which results from the summation of consecutive triangular numbers, starting from 1. If the triangular numbers in such a summation are depicted as horizontal triangular arrays of units then these arrays can be stacked vertically to yield a tetrahedral array.