carboniferous

n the Carboniferous period 石炭纪.

caramelize, -ise, carapace, carat, caravan, caravanserai, caraway, carbide, carbine, carbohydrate, carbolic, carbolic acid, carbon, carbon black, carbon copy, carbon dating, carbon dioxide, carbon monoxide, carbon paper, carbonated, carbonic acid, 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, cardboard, cardi(o)-, cardiac, cardigan,