What is the plural form of the word "cactus"?

Even the explanation says that both cacti and cactuses are considered correct.

My buddy and his father are both named Otis. When they are together we call them, "Oti."

Latin nouns of masculine gender end in ‘us’. The plural becomes ‘i’ as with cactus. However, feminine nouns usually end in ‘a’ and the plural is ‘ae’. Therefore a male graduate is an alumnus, and the plural is alumni. A female graduate is an alumna, and the plural is alumnae. Enough of Latin 101.

Boy !! I'd better get this one correct Been a dessert dweller for many years

gostbuster, you never say octopi, because octopus is not a Latin word. It's octopuses

if there are 5 balls then I will call it 'ba'

I dig that it's called cacti!

Das, so when you say octopi does that mean there's more than one octopus

I am not a number., u sre just a number

Very wise. some things are ridiculous. Anyone disagrees?

linguist here. the worde cactus is actually stemming from greek origins, so the plural is cactipodia, not cacti as everyone thinks.

l knew the answer because if a recent conversation at work about Cacti / Cactus .