仙人掌的英文是 "cactus"，来源于拉丁文 "cactus"，意怺是 "瘤状物"。

一些英文例句：

The cactus is a unique plant that is able to thrive in harsh desert environments.

The cactus has sharp spines that protect it from predators.

Some species of cactus can store water in their stems, allowing them to survive long periods of drought.