Definitions by CillaSaurus!

Aquactus 

A cactus that is submerged in water.
An Underwater Cactus.
Combination of "aqua" and "cactus"

Person One: "Yo, what is that cactus doing with the fish in an aquarium?"
Person Two: "Oh, don't worry, it's an aquactus"

Aquactus by CillaSaurus! June 6, 2009