cactus
/ˈkæktəs/noun
A plant belonging to a family of spiny, water-storing succulents native to the Americas and adapted to hot, dry regions.
Example sentence
- “The only plant on her desk is a small cactus that rarely needs watering.”
Both plurals are accepted: "cacti" keeps the Latin, "cactuses" follows normal English. Cacti is more common in print.