What does prickly pear mean in cooking?

prickly pear means: The prickly-pear cactus produces an egg-sized fruit. It is also known as tuna. It has garnet-colored flesh. Often made into prickly-pear jelly. (in Cooking Dictionary)

What else does prickly pear mean?

One of many opuntias with bristly flattened stem segments and often colored flowers. (in Merlin Dictionary)

Certain cactuses have edible fruits. (in Merlin Dictionary)