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The Collaborative International Dictionary
Interleaves

Interleaf \In"ter*leaf`\, n.; pl. Interleaves. [See Interleave.] A leaf inserted between other leaves; a blank leaf inserted, as in a book.

Wiktionary
interleaves

vb. (en-third-person singular of: interleave)

WordNet
interleaves

See interleaf

interleaf
  1. n. a blank leaf inserted between the leaves of a book

  2. [also: interleaves (pl)]