The Hollow Moon hypothesis, or Spaceship Moon hypothesis, proposes that Earth's Moon is either wholly hollow or otherwise contains a substantial interior space.
Ring most broadly refers to a hollow circular shape or to a high-pitched sound.
Casting is a manufacturing process in which a liquid material is usually poured into a mold, which contains a hollow cavity of the desired shape, and then allowed to solidify.
Jockey Hollow, also known as Wick House and Wick Hall, was the traditional Wick family estate in New Jersey.
Hollow Knight is a Metroidvania video game developed and published by Australian studio Team Cherry.
Called Rainbow, the magical creature is a hollow strawberry-flavoured white chocolate decorated with a love-heart filled with coloured sprinkles.
De Modderige Bol is a Hollow Post mill in Goëngahuizen, Friesland, Netherlands which has been restored to working order.
Holdup Hollow was an unincorporated community located in Converse County, Wyoming, United States.
Called Rainbow, the magical creature is a hollow strawberry flavoured white chocolate decorated with a love-heart filled with coloured sprinkles.
An iris cyst, or uveal cyst, is a small hollow structure either attached to the iris of the eye or floating free in the anterior chamber.
Ash Hollow State Historical Park is located near Lewellen, Nebraska in Garden County.
The urinary bladder is a hollow muscular organ in humans and some other animals that collects and stores urine from the kidneys before disposal by urination.
Hollow Man is a 2000 American-German science fiction horror film directed by Paul Verhoeven and starring Kevin Bacon, Elisabeth Shue and Josh Brolin.
Sleepy Hollow is a 1999 American gothic supernatural horror film directed by Tim Burton.
In chemical processing, a packed bed is a hollow tube, pipe, or other vessel that is filled with a packing material.
The Wheel of Life is a famous boulder problem in Hollow Mountain Cave in the Grampians of Australia.
In vertebrates, the gallbladder is a small hollow organ where bile is stored and concentrated before it is released into the small intestine.
Antiseptic lavage is a means of washing, especially of a hollow organ, such as the stomach or lower bowel, with repeated injections of warm water mixed with an antiseptic or antifungal solution.
Take In Hollow is an unincorporated community in Raleigh County, West Virginia, United States.
The Hollow Earth is a pseudoscientific concept proposing that the planet Earth is entirely hollow or contains a substantial interior space.