Emily Dickinson Lexicon

AP'EN-NINE, a. [L. apenninus; ad and penninus, an epithet applied to a peak or ridge of the Alps. Livy. Celtic pen or ben, the peak of a mountain, or in general, a mountain.]

Pertaining to or designating a chain of mountains, which extend from the plains of Piedmont, round the gulf of Genoa, to the center of Italy, and thence south-east to the extremity.