A botanical term for darnel (Lolium temulentum), a poisonous weed that closely mimics wheat in its early growth stages — indistinguishable until the heads form. All eight New Testament occurrences fall within Jesus' parable of the wheat and tares (Matt 13:24–30, 36–43), making it one of the most narrowly distributed nouns in the Greek Testament. The parable's power depends on the biological reality: darnel's roots intertwine with wheat, making premature removal destructive. Spanish cizaña (which has entered everyday language meaning 'discord') and French ivraie (from Latin ebriaca, 'intoxicating') both preserve the agricultural specificity and hint at the weed's toxic properties.