(physics) The quantum number that represents the angular momentum of an atomic orbital

(idiomatic) A person who holds a position in an organization that corresponds to that held by another person in another organization; a counterpart

plural of whole number

The number of protons in an atom.

(idiomatic) To be destined for someone.

(idiomatic) To act in one's own interests; to act in a manner advantageous primarily to oneself.

plural of coordination number

A number that shares its prime factors with another.

(number theory) A (nonzero) natural number that is expressible as the product of two (or more) natural numbers other than itself and 1.

(physics) A quantum number related to the difference between the numbers of quarks and antiquarks in a system of subatomic particles