2,2-bis-1,1-dichloroethane

2,2-bis(para-chlorophenyl)-1,1-dichloroethane

[¦tü ¦tü ‚bis ′par·ə ‚klȯr·ə′fen·əl ¦wən ¦wən di‚klȯrō′e‚thān] (organic chemistry) C14H10Cl4 A colorless, crystalline compound with a melting point of 109-111°C; insoluble in water; used as an insecticide on fruits and vegetables. Also known as DDD; TDE.