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The Collaborative International Dictionary
Peninsulating

Peninsulate \Pen*in"su*late\, v. t. [imp. & p. p. Peninsulated; p. pr. & vb. n. Peninsulating.] To form into a peninsul

  1. South River . . . peninsulates Castle Hill farm.
    --W. Bentley.

Wiktionary
peninsulating

vb. (present participle of peninsulate English)