(geometry) For a given space, the maximum number of non-overlapping unit spheres that can be arranged in that space such that they each touch a common unit sphere.

(geometry) Synonym of kissing number

plural of number ray

Third-person singular simple present indicative form of number close

plural of number close

A number used in application to a thing. E.g. "11" is abstract but "11 men" is concrete.

(grammar) A word that expresses one or more of a specific number of parts of a whole. / (arithmetic) A fraction, such as 1/2 or 3/5.

(India) An upbeat musical number within a film, accompanied by a provocative dance sequence performed by attractive women, or "item girls".

(mathematics, informal, mostly plural) Any number appearing in a sequence described by the Collatz conjecture.

(mathematics, number theory) An infinite sequence of integers that comprises the denominators of the closest rational approximations to the square root of 2.