1. (computing) a tree having four branches at each node, used in the construction of some multidimensional databases, such as in cartography

Encyclopedia: Quadtree

• bullet train
• bullet vote
• bullet-headed
• bullethead
• bulletin
• bulletin board
• bulletin board system
• bulletproof
• bulletproof vest
• bullfight
• bullfighter
• bullfighting
• bullfinch
• bullfrog
• bullhead
• bullhead catfish
• bullheaded
• bullheadedness
• bullhorn
• bullion
• bullish
• bullnecked
• bullnose
• bullnosed plane
• bullock