An hourglass (or sandglass, sand timer, or sand clock) is a device used to measure the passage of time. It comprises two glass bulbs connected vertically by a narrow neck that allows a regulated flow of a substance (historically sand) from the upper bulb to the lower one due to gravity. Typically, the upper and lower bulbs are symmetric so that the hourglass will measure the same duration regardless of orientation. The specific duration of time a given hourglass measures is determined by factors including the quantity and coarseness of the particulate matter, the bulb size, and the neck width.
Depictions of an hourglass as a symbol of the passage of time are found in art, especially on tombstones or other monuments, from antiquity to the present day.[citation needed] The form of a winged hourglass has been used as a literal depiction of the Latin phrase tempus fugit ("time flies").
An hourglass (or sandglass, sand timer, or sand clock) is a device used to measure the passage of time. It comprises two glass bulbs connected vertically...
The hourglass figure is one of four traditional female body shapes described by the fashion industry. The other shapes are the rectangular, inverted triangle...
is accompanied by an hourglass device. Depending on the length of service, a bronze, silver, gold, or bronze and gold hourglass are worn on the suspension...
Hourglass drums are a sub-category of membranophone, or drum, characterized by an hourglass shape. They are also known as waisted drums. Drumheads are...
The Hourglass Sanatorium (Polish: Sanatorium pod klepsydrą) is a 1973 Polish surrealist film directed by Wojciech Jerzy Has, starring Jan Nowicki, Tadeusz...
The hourglass dolphin (Lagenorhynchus cruciger) is a small dolphin in the family Delphinidae that inhabits offshore Antarctic and sub-Antarctic waters...
An hourglass corset is a garment that produces a silhouette resembling an hourglass shape characterized by wide hips, narrow waist (wasp waist), and wide...
The Engraved Hourglass Nebula (also known as MyCn 18) is a young planetary nebula in the southern constellation Musca. It was discovered by Annie Jump...
is Hourglass, causing The Dragonfly to assault the Dalai Lama, causing chaos. Meanwhile, Jill discovers that Landers is Hourglass. When Hourglass clashes...
Wikimedia Commons has media related to Tornadoes. Wikimedia Commons has media related to Pictures of tornadoes. A tornado is a violently rotating column...
This article lists the largest hourglasses that have been built. Eisenstraße - "Panta Rhei" (JPEG) (Information plaque) (in German). Ybbsitz. 2000. "Brunnen...
compared to the figure eight or hourglass Dog bone shape, an hourglass with rounded ends Hourglass corset Ntama Engraved Hourglass Nebula Inverted bell Kite...
Hourglass Economy is an economy that produces more upper and lower classes, causing a decline in the middle class. An example would be during the Industrial...
Cyclocosmia is a genus of mygalomorph trapdoor spiders in the family Halonoproctidae, first described by Anton Ausserer in 1871. Originally placed with...
Hourglass Angel is an American apparel company producing and selling waist trainers, shapewear, corsets, and other undergarments by several brands, including...
Sanatorium Under the Sign of the Hourglass is the English title of Sanatorium Pod Klepsydrą, a novel by the Polish writer and painter Bruno Schulz, published...
system consisting of a sun orbited by a number of celestial bodies: the Hourglass Twins, a pair of planets orbiting each other with sand flowing from one...
The band released the double single A-side single "Desert Snow" and "Hourglass" on July 22, 2022. "Just Before the Morning" was released on October 12...
Bearing an Hourglass is a fantasy novel by Piers Anthony. It is the second of eight books in the Incarnations of Immortality series. Some time in the...
Polypedates cruciger (commonly known as the Sri Lanka whipping frog or common hour-glass tree-frog) is a species of frog in the family Rhacophoridae endemic...
Cows on Hourglass Pond is the third solo studio album by American musician Avey Tare. It was released on March 22, 2019, by Domino Recording Company....
Polypedates pseudocruciger (common names: false hour-glass tree frog or yellow tree frog) is a species of frog in the family Rhacophoridae endemic to the...
sometimes with wings, dressed in a robe and carrying a scythe and an hourglass or other timekeeping device. As an image, "Father Time's origins are curious...