cactus

noun

cac·​tus ˈkak-təs How to pronounce cactus (audio)
plural cacti ˈkak-ˌtī How to pronounce cactus (audio)
-(ˌ)tē
or cactuses also cactus
: any of a family (Cactaceae, the cactus family) of plants that have succulent stems and branches with scales or spines instead of leaves and are found especially in dry areas (such as deserts)

Examples of cactus in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Doble uses innovative sustainable materials including seaweed, cactus leather, deadstock and recycled textiles. Lisa Lockwood, Footwear News, 24 Oct. 2025 By damaging cactuses and other vegetation, the burros also put themselves at risk, damaging the landscape and limiting future food supplies. John Leos, AZCentral.com, 23 Oct. 2025 If your home doesn’t have a space that stays dark for at least 12 hours at a stretch, cover your Christmas cactus with a thick blanket daily to extend the dark period as needed to spur flower formation. Megan Hughes, Better Homes & Gardens, 22 Oct. 2025 Key Takeaways Nopal cactus is low in calories and high in fiber, vitamins, and minerals like calcium. Barbie Cervoni, Verywell Health, 22 Oct. 2025 See All Example Sentences for cactus

Word History

Etymology

New Latin, genus name, from Latin, cardoon, from Greek kaktos

First Known Use

1738, in the meaning defined above

Time Traveler
The first known use of cactus was in 1738

Cite this Entry

“Cactus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cactus. Accessed 29 Oct. 2025.

Kids Definition

cactus

noun
cac·​tus ˈkak-təs How to pronounce cactus (audio)
plural cacti -ˌtī How to pronounce cactus (audio)
-(ˌ)tē
or cactuses also cactus
: any of a large family of flowering plants able to live in dry regions and having fleshy stems and branches that bear scales or prickles instead of leaves

More from Merriam-Webster on cactus

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