Meaning of INTERPOLATION in English
noun that which is introduced or inserted, especially something foreign or spurious.
2. interpolation ·noun the act of introducing or inserting anything, especially that which is spurious or foreign.
3. interpolation ·noun 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.
Webster English vocab. Английский словарь Webster. 2012