noun ( pl. -ti |-tī; -tē| or -tuses )
a succulent plant with a thick, fleshy stem that typically bears spines, lacks leaves, and has brilliantly colored flowers. Cacti are native to arid regions of the New World and are cultivated elsewhere, esp. as houseplants. • Family Cactaceae: numerous genera and species.
cactaceous |kakˈtā sh əs| |køkˈteɪʃəs| |-ˈteɪʃəs| adjective
early 17th cent. (in the sense [cardoon] ): from Latin, from Greek kaktos ‘cardoon.’