(computing) A type of self-balancing binary search tree, typically used to implement associative arrays.

(idiomatic) To advertise oneself as a prostitute.

plural of red-light district

(soccer) A red card, signifying a player's instant dismissal from the game for a single major foul or misconduct, distinct from and graver than a second yellow card, which a player may receive for several minor fouls.

plural of red-shouldered hawk

plural of red-necked buzzard

Buteo auguralis, a species of bird of prey in the Accipitridae family found in Africa

A medium-sized hawk native to North America, of species Buteo lineatus.

Buteo polyosoma, a species of hawk.

plural of red-crested pochard