In*ter`po*la"tion (?), n. [L. interpolatio an alteration made here and there: cf. F. interpolation.]
1.
The act of introducing or inserting anything, especially that which is spurious or foreign.
2.
That which is introduced or inserted, especially something foreign or spurious.
Bentley wrote a letter . . . . upon the scriptural glosses in our present copies of Hesychius, which he considered interpolations from a later hand.
De Quincey.
3. Math.
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 1913.