All articles starting with D

Decade Volcanoes

The Decade Volcanoes are 16 volcanoes designated by IAVCEI in the 1990s, part of the UN's disaster-reduction decade, for research and public awareness to reduce volcanic risk.

Decadence: a condition of moral or cultural decline in societies and art, from medieval Latin decadentia; also the fin-de-siecle Decadent movement of Baudelaire, Wilde, and Huysmans embracing artifice and excess.

Sep 19, 2026

Decadence Colorado

Decadence Colorado, also known as Decadence NYE, is an annual two-night New Year's Eve EDM festival held December 30–31 at the Colorado Convention Center in Denver.

Sep 19, 2026

Decadence New Year's Eve

Decadence New Year's Eve is a two-city American EDM festival held every December 30 and 31: Decadence Colorado in Denver and Decadence Arizona at Phoenix Raceway.

Decadent movement

Decadent movement, also called Decadence: a late 19th-century Franco-British literary and artistic movement favoring beauty, artifice, and transgressive themes over morality, active in France from about 1870 to the Dreyfus Affair and in Britain in the 1890s.

Decades (Motionless in White album)

Decades is the seventh studio album by American metalcore band Motionless in White, released July 17, 2026 on Roadrunner. It marks the band's 20th anniversary, features Corey Taylor, Skylar Grey, and Dark Divine, and yielded the chart-topping single Afraid of the Dark.

Decaffeination

Decaffeination removes most caffeine from green coffee beans using water, ethyl acetate, dichloromethane, or supercritical CO2. Decaf still holds 2-15 mg caffeine per cup; Roselius patented the first process in 1905, Zosel the CO2 method in 1970.

Decagon

A decagon is a polygon with 10 sides and 10 vertices, from the Greek for ten corners; the regular decagon has equal sides and 144° interior angles.

Decagon (company)

Decagon, also known as Decagon AI, is an enterprise AI company founded in 2023 by Jesse Zhang and Ashwin Sreenivas that builds AI customer support agents for Duolingo and other companies.

Decagonal quasicrystal

A decagonal quasicrystal is an intermetallic solid whose atoms are quasiperiodic in two dimensions and periodically stacked along a tenfold axis, discovered in 1985 in Al-Mn alloys.

Sep 29, 2026

Decalcification (histology)

Decalcification is a laboratory procedure that removes calcium salts from bone and calcified tissue, using acids or EDTA, so specimens can be cut into thin sections for microscopic diagnosis.

Decalcification Technique

Decalcification technique: histological removal of calcium minerals from bone and teeth (MeSH D003648) using acids such as nitric or formic acid or the chelator EDTA, balancing speed against tissue, antigen, and nucleic acid preservation.

Decalin

Decalin, also known as decahydronaphthalene, is a bicyclic cycloalkane of two fused cyclohexane rings, used as a solvent, a high-cetane diesel component, and a hydrogen carrier.

Decamethonium

Decamethonium (Syncurine, C10) is a synthetic bisquaternary depolarizing neuromuscular blocking drug synthesized in 1948 by Barlow & Ing and independently by Zaimis; prototype depolarizer, discontinued for irreversibility.

Decamethylcyclopentasiloxane

Decamethylcyclopentasiloxane, also known as cyclopentasiloxane or D5, is a cyclic organosilicon compound, an odorless, colorless liquid used in silicone polymers, personal care products, and dry-cleaning solvents.

Decan

A decan, in ancient Egyptian astronomy, is a star or star group that rose every ten days, so 36 decans marked the night hours and the year.

Decanal

Decanal, also known as caprinaldehyde, is a saturated ten-carbon fatty aldehyde used in flavorings and fragrances, with a characteristic citrus-like odor found in orange and grapefruit oils.

Decane

Decane is a straight-chain alkane with ten carbon atoms, formula C₁₀H₂₂, a colorless liquid boiling near 174 °C that is found in crude oil and used as a solvent and diesel surrogate.

Decaniacum

Decaniacum, also Decaniacus, an ancient Gallo-Roman estate name identified with Dégagnac in Lot, France; attested as the country estate of Ruricius, bishop of Limoges, in his late fifth-century letters.

Decanoic acid

Decanoic acid, also known as capric acid, is a saturated ten-carbon medium-chain fatty acid found naturally in coconut oil, palm kernel oil, and mammalian milk, and studied for antiseizure effects.

Decantation

Decantation, also known as decanting, is a laboratory separation technique that pours a liquid off a settled solid precipitate or the denser of two immiscible liquids.

Decanter

A decanter, or wine decanter, is a stoppered decorative glass vessel into which wine or spirits are poured for serving, to separate sediment and aerate the drink.

Decapitated (band)

Decapitated is a Polish death metal band formed in 1996 in Krosno by teenage brothers Wacław "Vogg" and Witold Kiełtyka, known for albums like Winds of Creation.

Decapitation

Decapitation is the separation of the head from the body, killing by severing the spinal cord and the brain's blood supply; it remains a judicial execution method in Saudi Arabia.

Decapod iridescent virus 1

Decapod iridescent virus 1 (DIV1), renamed Decapodiridovirus litopenaeus1 by ICTV in 2023, is an iridovirus of shrimp, prawns, and crayfish causing 80–100% mortality; a WOAH-listed disease first identified in China in 2014.

Decapolis (Δεκάπολις)

Decapolis (Δεκάπολις, "ten cities") was a group of Hellenized cities east and south of the Sea of Galilee, listed by Pliny as ten and by Ptolemy as eighteen; a geographical label, not a formal league.

Decapping complex

Decapping complex: the Dcp1-Dcp2 holoenzyme (with Lsm1-7, Pat1, Edc1-3, EDC4) that removes the mRNA 5' cap, committing transcripts to 5'-3' decay by Xrn1; distinct from scavenger DCPS and DXO enzymes.

Decaprenyl diphosphate synthase-like

Decaprenyl diphosphate synthase-like enzymes (MtDPPS/Rv2361c, DdsA) are cis-prenyltransferases making C50 decaprenyl diphosphate from EZ-FPP for mycobacterial cell wall carrier lipid and bacterial CoQ10 biosynthesis.

Decarbonization

Decarbonization is the reduction of the carbon intensity of an economy, or CO2 emissions per unit of GDP or energy, through electrification, renewables, efficiency, and carbon removal aimed at net zero.