Noun has 2 senses

• barrel cactus(n = noun.plant) - a cactus of the genus Ferocactus: unbranched barrel-shaped cactus having deep ribs with numerous spines and usually large funnel-shaped flowers followed by dry fruits;



• barrel cactus(n = noun.plant) echinocactus - any cactus of the genus Echinocactus; strongly ribbed and very spiny; southwestern United States to Brazil;