| source : web1913 | Internecine \In`ter*ne"cine\, a. [L. internecinus deadly, murderous, fr. internecare to kill, to slaughter; inter between + necare to kill; akin to Gr. ? dead. See {Necromancy}.] Involving, or accompanied by, mutual slaughter; mutually destructive. Internecine quarrels, horrible tumults, stain the streets with blood. --Motley. | source : wn | internecine adj 1: (of conflict) within a group or organization; "an internecine feud among proxy holders" 2: characterized by bloodshed and carnage for both sides; "internecine war" [syn: {mutually ruinous}]