n (mathematics) A generalproof of a theorem by first proving it for a specific integer (for example) and showing that, if it is true for one integer then it must be true for the next.
n (theater) The use of rumors to twist and complicate the plot of a play or to narrate in a way that does not have to state truth nor fact within the play.
n (biology) In developmentalbiology, the development of a feature from part of a formerly homogenous field of cells in response to a morphogen whose source determines the feature's position and extent.