"interpolation" in the noun sense
1. interpolation, insertion
a message (spoken or written) that is introduced or inserted
"with the help of his friend's interpolations his story was eventually told"
"with many insertions in the margins"
2. interpolation
mathematics) calculation of the value of a function between the values already known
3. interjection, interposition, interpolation, interpellation
the action of interjecting or interposing an action or remark that interrupts
Source: WordNet® (An amazing lexical database of English)
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