# Number+to+be+divided

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**prime number**— UK / US noun [countable] Word forms prime number : singular prime number plural prime numbers maths a number that can only be divided exactly by itself and the number 1, for example 7 …112

**t-number**— ˈ ̷ ̷ˌ ̷ ̷ ̷ ̷ noun Usage: usually capitalized T Etymology: total light transmission + number : a number that is similar to the f number but takes into account the amount of light actually transmitted by a lens after loss by absorption and… …113

**List of Schubert compositions by D number**— The works by Franz Schubert are ordered according to D numbers in the Schubert Thematic Catalogue by Otto Erich Deutsch. This list of Schubert compositions by D number is divided in half for reasons of space; see:*Schubert compositions D number 1 …114

**Bulk Richardson number**— DefinitionThe Bulk Richardson Number (BRN) is a dimensionless number in meteorology relating vertical stability and vertical shear (generally, stability divided by shear). It represents the ratio of thermally produced turbulence and turbulence… …115

**Marangoni number**— The Marangoni number (Mg) is a dimensionless number named after Italian scientist Carlo Marangoni. The Marangoni number may be regarded as proportional to (thermal ) surface tension forces divided by viscous forces. It is – for example –… …116

**Administrative Controlled Substances Code Number**— The Administrative Controlled Substances Code Number (ACSCN) is a number assigned to drugs listed on the schedules created by the Controlled Substances Act. The ACSCN is defined in 21 CFR § 1308.03(a). Each chemical/drug on one of the schedules… …117

**prime number**— n a number that can be divided only by itself and the number one. For example, three and seven are prime numbers …118

**Avogadro's number**— , Avogadro constant (NA) a unit of relative quantity equal to the number of atoms or molecules per mole of a substance. The currently accepted value is 6.022 141 79 x 1023 per mole with an uncertainty of 0.000 000 47 x 1023 per mole (about… …119

**composite number**— n. an integer that can be evenly divided by some whole number other than itself or 1: distinguished from PRIME NUMBER …120

**f-number**— [ef′num΄bər] n. Photog. a number that represents the relative aperture of a lens, equal to the focal length divided by the effective diameter of the lens aperture: a higher number indicates a smaller opening …