The word "angiopteris" refers to a type of very large fern, which is a kind of plant. This fern is known for being "primitive," meaning it has been around for a long time and is different from many modern plants. Angiopteris is found in tropical areas, especially in the Pacific, where there is a lot of rain.
In summary, "angiopteris" is a noun that describes a specific kind of large fern found in tropical regions.