(obsolete, idiomatic) A bold front, an instance of standing one's ground.

sodium bicarbonate (NaHCO₃)

(travel, aviation) A printed card with basic entries listed for a global distribution system. / A card containing a clue.

loyalty card

A card used in a company's loyalty program, which rewards customers who make regular purchases.

(banking) A card, such as a credit card or debit card, which can be used for payment of goods or services.

(inorganic chemistry) The hard binary compound of beryllium and carbon Be₂C

(obsolete, inorganic chemistry) carbon disulfide

(inorganic chemistry) A polymeric binary compound formed by the action of fluorine on graphite

plural of cardboard city