plural of plate number coil

(philately) A United States postage stamp with the number of the printing plate or plates printed on it.

plural of prime number theorem

(number theory) The theorem that the number of prime numbers less than n asymptotically approaches n / ln(n) as n approaches infinity.

(chemistry) A measurement of the basicity of an oil, expressed in terms of the number of milligrams of potassium hydroxide per gram of oil sample.

(informal) It is one's time to die, or to undergo some other difficult experience.

(mathematics) A natural number whose square cannot be written as the sum of two nonzero squares.

plural of non-hypotenuse number

plural of Stirling partition number

(mathematics) Synonym of Stirling number of the second kind