The human immunodeficiency virus destroys the immune system, causing the body to lose its ability to fight disease.

The human immunodeficiency virus is the virus that causes AIDS.

The feline immunodeficiency virus can potentially have serious effects on a cat's health.

My cat has been infected with the feline immunodeficiency virus.

The Edgeworth-Kuiper belt is a collection of icy bodies located on the outer edge of the solar system.

Ergocalciferol is a type of Vitamin D2.

He smashed his face into the keyboard and typed 'asdfghjkl'.

I thought his behavior was strange.

He wrote his name using the character for 'work'.

I couldn't see anything in the dark room.