What part of speech is hemisphere?

"Hemisphere" can be two parts of speech depending on how it's used:

* Noun: When referring to a half of a sphere or a half of the Earth.

* Example: "The Northern Hemisphere experiences winter in December."

* Adjective: When describing something that is shaped like a hemisphere.

* Example: "The dome of the building had a hemispherical shape."

So, it's important to look at the context to determine the part of speech.