A ratio used in fluid dynamics to define a concentration profile of suspended sediment and which determines how sediment will be transported in a flowing fluid.

(roguelikes, humorous) The pseudorandom number generator used by a roguelike game's engine.

Which, what position (in an ordered series, such as which day of the month or which floor). (This entry is a translation hub.)

plural of line number

(computing) The sequential number indicating a particular line of text in a text file.

A suggested cognitive limit to the number of people with whom one can maintain stable social relationships. It has been proposed to lie between 100 and 250, with a commonly used value of 150.

azimuthal quantum number

plural of mixed number

The number, on a bib, that is used to identify entrants in a race

plural of contact number