/ˈkæktəs ||; ˈkæktəs/noun [C] (plural cactuses or cacti /ˈkæktaɪ ||; ˈkæktaɪ/) a type of plant that grows in hot, dry areas, especially deserts. A cactus has a thick central part (stem)and sharp points (prickles) but no leaves. 仙人掌 ☞picture on page C2 见C2页插图