Edgepedia

Annulment

Annulment, or nullity, is a court declaration that a marriage or other legal act was never valid, unlike divorce which ends a valid marriage; covers void and voidable grounds, financial effects, religious annulment, and EU and arbitration uses.

Annulment in the Philippines

Annulment in the Philippines is a court process dissolving defective valid marriages, distinct from nullity; the Family Code allows only annulment and legal separation since the Philippines and Vatican City permit no absolute divorce.

Annuloplasty

Annuloplasty, including tricuspid annuloplasty, is a cardiac surgical technique that narrows a dilated heart valve annulus with a prosthetic ring or band, restoring leaflet coaptation to correct valve regurgitation.

Annunciation

The Annunciation, or Annunciation to Mary, is the Christian feast kept on 25 March, commemorating Gabriel's announcement to the Virgin Mary in Nazareth that she would bear Jesus.

Annunziata Rees-Mogg

Annunziata Mary Rees-Mogg, born 1979, is a British journalist and politician who served as a Brexit Party Member of the European Parliament from July 2019 until January 2020.

Annus horribilis

Annus horribilis, Latin for "horrible year", a formal phrase for a year of disaster, popularized by Queen Elizabeth II's 24 November 1992 Guildhall speech about the Windsor Castle fire and royal separations, modelled on annus mirabilis.

Annus mirabilis

Annus mirabilis, plural anni mirabiles, is Latin for "remarkable year", used in English for a year of wonders or disasters; it entered English through John Dryden's 1667 poem about 1666.

Annwn

Annwn (Annwfn), the otherworld of Welsh mythology: a realm of feasting, youth, and plenty ruled by Arawn in the Mabinogi, raided by Arthur in Preiddeu Annwfn; not a land of the dead, despite medieval identification with Hell.

Annwn Regio

Annwn Regio, named for the Welsh Otherworld, is a large mottled terrain region about 2300 km wide on Jupiter's moon Europa, officially named by the IAU in 2007 and known for its extensive chaos terrain.

Sep 21, 2026

Anny Cazenave

Anny Cazenave, born 1944, is a French space geophysicist, emeritus scientist at LEGOS in Toulouse, who pioneered satellite measurement of global sea level rise and won the 2020 Vetlesen Prize.

Oct 10, 2026

Anny Jutand

Anny Jutand is a French chemist, emeritus research director at CNRS, working at the École normale supérieure in Paris on electrochemistry applied to organometallic catalysis.

Ano (singer)

Ano (あの), nicknamed Ano-chan, is a Japanese singer-songwriter, actress, and voice actress; ex-Yurumerumo! idol (2013–2019) whose 2022 Chainsaw Man ending theme "Chu, Tayousei." made her a star, with a 2025 sold-out Budokan show.

ANO1

ANO1 (anoctamin 1, TMEM16A, DOG1) is a human calcium-activated chloride channel gene on 11q13.3, identified in 2008, gating by direct Ca2+ binding, amplified in several cancers.

Anoa'i family

Anoa'i family, the Samoan Dynasty of American Samoa, a professional wrestling bloodline linked to Peter Maivia by a blood-brother bond; produced The Rock, Roman Reigns, The Usos, Yokozuna, and the Wild Samoans.

Anocracy

Anocracy: a mixed regime blending democratic and autocratic features, defined in Polity data as scores -5 to +5; associated with elevated civil war risk, though Vreeland (2008) disputes that link.

Oct 20, 2026

Anoctamin

Anoctamin (ANO/TMEM16): a family of ten mammalian membrane proteins, Ca2+-activated chloride channels (ANO1, ANO2) or phospholipid scramblases (e.g., ANO6/TMEM16F, Scott syndrome), with ten transmembrane helices per subunit.

Anoctamin-5-related limb-girdle muscular dystrophy R12

LGMD-R12 (formerly LGMD2L, anoctaminopathy) is an autosomal recessive limb-girdle muscular dystrophy caused by biallelic ANO5 variants, with adult-onset proximal lower limb weakness, high creatine kinase, and slow progression.

Anoda

Anoda is a genus of about 24 accepted Malvaceae (mallow) species of annual herbs native to tropical and subtropical America, centered in Mexico; its best-known species, Anoda cristata, is a crop weed and Mexican food plant.

Anode

An anode, also called a zincode, is the electrode of an electrochemical cell where oxidation occurs; it is negative in a galvanic cell and positive in an electrolytic cell.

Oct 15, 2026

Anode-free cell

An anode-free cell, also called anode-less or Li-free, is a rechargeable battery built without an anode; lithium plates onto a bare copper collector on first charge, enabling higher energy density.

Anodic bonding

Anodic bonding, also called electrostatic or field-assisted bonding, is a wafer-level process sealing glass to silicon with heat and high DC voltage, widely used to package MEMS sensors.

Anodic oxidation

Anodic oxidation, or anodizing, is an electrochemical method that grows controlled oxide films on a metal made the anode, used on aluminum for corrosion protection, dyeing, and nanofabrication templates.

Anodic stripping voltammetry

Anodic stripping voltammetry (ASV) is an electroanalytical technique in which metal ions are deposited onto an electrode and stripped off, measuring trace metals like lead and cadmium at sub-ppb levels.

Anodizing

Anodizing, also called anodization, is an electrochemical process that converts a metal surface, most often aluminum, into a decorative, durable, corrosion-resistant oxide finish; the part serves as the anode in an acid electrolyte bath.

Anodontia

Anodontia, also called total anodontia or complete congenital absence of teeth, is the complete failure of all teeth to develop, an extremely rare autosomal recessive dental anomaly usually linked to syndromes such as ectodermal dysplasia and treated with dentures or implants.