HEOD

HEOD: The abbreviation for the scientific name of the insecticide dieldrin. (The scientific name for dieldrin [1,2,3,4,10,10-hexachloro-6,7-epoxy-1,4,4á,5,6,7,8,8á-octahydro-1,4-endo,exo-5,8-dimethanonaphthalene] is not easily recited or recalled.) See: Aldrin and dieldrin.