noun🔗Shareأثر التكثفAn artificial cloud made by the exhaust of jet aircraft or wingtip vortices that precipitate a stream of tiny ice crystals in moist, frigid upper air."The airplane's contrail stretched across the sky, a thin white line marking its path. "امتد أثر التكثف للطائرة عبر السماء، وهو خط أبيض رفيع يحدد مسارها.weatherenvironmentsciencephysicstechnicalChat with AIVocabulary GamePractice Reading