noun Date: 1851 a lag or material used for making lags: as, material for thermal insulation especially around a cylindrical object, planking used especially for preventing cave-ins in earthwork or for supporting an arch during construction
LAGGING
Meaning of LAGGING in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012