Word.ws English Dictionary

Plural of cactus

irregular plural

The plural of cactus is cacti, cactuses or cactus.

Forms of cactus

Singularcactus /ˈkæktəs/
Pluralcacti /ˈkæktaɪ/
cactuses
cactus /ˈkæktəs/
Countablecountable

Cacti and cactuses in a sentence

  • The parallel market in plants is growing and rare cacti are in high demand.2025 March 10, Isabella Kaminski, “A cacti-smuggling case with a prickly end: the novel way courts are making poachers pay”, in The…. From the entry parallel market
  • The discussion which follows is based on the above studies of yeasts, cacti and drosophilae.2013, Graham G. Stewart, Inge Russell, Advances in Biotechnology: Proceedings of the Fifth International Yeast Symposium Held in London…. From the entry drosophila
  • The allusion is to the small myrtlelike fruits, not unlike blueberries, of these cacti.2013, A. W. Smith, A Gardener's Handbook of Plant Names: Their Meanings and Origins. From the entry myrtlelike
  • Most cacti classed as cholla are a bristling mass of needle-like, spines.1941, American Museum of Natural History, Natural History Magazine, Incorporated, Natural History, The American Museum of Natural History…. From the entry superferocious
  • The flowers of the Easter cactus are rounder and more daisy-like than tubular types of the other two cacti.2012 December 22, Trish Grenfell, “Ask the Master Gardener”, in Colfax Record. From the entry Easter cactus

Meaning of cactus

  1. noun Any member of the family Cactaceae, a family of flowering New World succulent plants suited to a hot, semi-desert climate.
  2. noun Any succulent plant with a thick fleshy stem bearing spines but no leaves, such as euphorbs.
  3. noun A vivid green color inspired by the color of cacti.

Full definition of cactus

Nouns ending in -us: plural -i

Questions about the plural of cactus

What is the plural of cactus?
The plural of cactus is cacti, cactuses or cactus.
Which is correct, cacti or cactuses?
Both are used. cacti is the more common of the two in English writing.
Is cactus countable?
Cactus is a countable noun.

Source and license

Adapted from Wiktionary: cactus (page history and authors) and the entries of its forms. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws left out forms marked obsolete, archaic, rare or dialectal and added the examples. Wiktionary data of 2026-09-02.

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Cite this page: “Plural of cactus.” Word.ws, https://word.ws/plural/cactus. Based on Wiktionary, CC BY-SA 4.0.