an insecticide consisting of a chlorinated hydrocarbon, CCl, usually mixed with a bait and used esp. against fire ants
Origin of mirexcoined from initials of its three developers + -ex, arbitrary suffix (suggesting Middle English mire, ant: see pismire and rex)
A white odorless crystalline solid, C10Cl12, formerly used as an insecticide against ants and as a fire retardant. It was banned in the United States in 1978 because of its effects on the environment and possibly on human health.
Origin of mirexPerhaps (pis)mir(e) ex(terminate)