English

Noun

internecion ‎(plural internecions)

1. destruction, massacre ("laughter. — That natural propension of self-love, and natural principle of self-preservation, will necessarily break out into wars and internecions" Hale)
2. Mutual destruction (less common)

References

• Encyclopaedia perthensis, or, Universal dictionary of the arts, sciences, literature, etc.: intended to supersede the use of other books of reference, Volume 12, Edition 2, printed by J. Brown, 1816, p. 246. Places second meaning first.
• “internecion” listed in the Oxford English Dictionary [2nd ed., 1989]
  rare. (ɪntəˈniːʃən), from Latin interneciōn-em, from internecāre, from inter + necāre Lists both senses, the first supported by 3 quots. (viz. 1610, 1658, ante 1677) and the second (marked “improp.”) supported by 1 quot. (viz. 1893).