interpolation

The act of interpolating; the insertion of new words or expressions in a book or manuscript; especially, the falsification of a text by spurious or unauthorized insertions.

That which is interpolated; new or (especially) spurious matter inserted; an unannounced or unauthorized insertion in a text.

In mathematics, the process of finding, from the given values of a function for certain values of the variable, its approximate value for an intermediate value of the variable.

The act of introducing or inserting anything, especially that which is spurious or foreign.

That which is introduced or inserted, especially something foreign or spurious.

The method or operation of finding from a few given terms of a series, as of numbers or observations, other intermediate terms in conformity with the law of the series.

An abrupt change in elements, with continuation of the first idea.

the process of estimating the value of a function at a point from its values at nearby points.

The process of including and processing externally-fetched data in a document or program; see interpolate.

That which is introduced or inserted, especially something foreign or spurious.