carbon monoxide

poisonous gas formed when carbon burns incompletely, present eg in the exhaust fumes of petrol engines 一氧化碳.

car-park (US parking-lot), car-port, carafe, caramel, caramelize, -ise, carapace, carat, caravan, caravanserai, caraway, carbide, carbine, carbohydrate, carbolic, carbolic acid, carbon, carbon black, carbon copy, carbon dating, carbon dioxide, carbon paper, carbonated, carbonic acid, carboniferous, carbonization, -isation, carbonize, -ise, Carborundum, carboy, carbuncle, carburettor, carcass, carcinoma, card, card index, card vote, card-carrying member, card-game, card-sharp (also card-sharper), card-table, cardamom,