Boardcard

There is a betting round, and the dealer burns and turns a final boardcard.[…]At Texas holdem, each player receives two cards to start, and at the showdown may play both individual cards and three boardcards, called “playing the board.”

Source: wiktionary

Texas Hold ’Em and Omaha Poker / These poker games involve cards dealt to the players as well as boardcards that can be mutually used to improve hands. Players are dealt two downcards in Texas Hold ’Em, followed by a series of betting rounds. With each betting round, a new boardcard is added.

Source: wiktionary

Three boardcards are turned simultaneously and another round of betting occurs. The next two boardcards are turned one at a time, with a round of betting after each.

Source: wiktionary