Interlineation
Pronunciation : In`ter*lin`e*a"tion
Part of Speech : n.
Etymology : [Cf. F. interlin?ation.]
Definition : 1. The act of interlining.
2. That which is interlined; a passage, word, or line inserted between lines already written or printed.
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder