Cacti is the Latin plural of cactus, and some writers use it in English. Cactuses is the plural form in English. Dictionaries list both, and neither is right or wrong. Also, like many names of plants, the cactus is sometimes treated as plural.
Cactus is not the only Latin-derived English word ending in “us”, and most are conventionally pluralized in the English manner.
Can you name a few more?
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1 responses on "ESL Learning: Cacti or Cactuses?"
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Thе material is quite significant.