All articles starting with H

Hausa children's literature

Hausa children's literature is the body of written material for children in the Hausa language of Northern Nigeria, from school primers and folktales to plays and novellas.

Hausa drama

Hausa drama, or wasan kwaikwayo ("game of imitation"), is the dramatic tradition of Hausa speakers in northern Nigeria, spanning oral forms, plays, and radio, TV, and video drama.

Hausa embroidery is the decorative needlework tradition of the Hausa people of northern Nigeria, best known for the hand-embroidered men's robes called babban riga, documented from the 15th century onward.

Hausa Islamic devotional poetry

Hausa Islamic devotional poetry is religious verse in the Hausa language written in Ajami (Arabic) script, with praise poems (madahu) and admonition (wa'azi) as central genres.

Hausa Kingdoms

Hausa Kingdoms (Hausa Bakwai): independent city-states, Kano, Katsina, Zaria, Daura, Gobir, Rano, Biram, in northern Nigeria; Sarki-ruled, trans-Saharan trade hubs, Muslim by 1200, absorbed by Usman dan Fodio's 1804 jihad into the Sokoto Caliphate.

Hausa language

Hausa, also known as Harshen Hausa, is the largest Chadic language, spoken in northern Nigeria and southern Niger and used as a lingua franca across West Africa.

Hausa maroka praise tradition

The Hausa maroka praise tradition, called roko in Hausa, is professional praise-singing in Northern Nigeria, in which specialists called maroka perform laudatory songs for patrons in return for gifts.

Hausa people

Hausa people, West African people of Northern Nigeria and Niger speaking Hausa, an Afro-Asiatic Chadic language with tens of millions of speakers. Known for Ajami and Boko scripts, the Sokoto Caliphate, and trading diaspora communities in Yoruba towns.

Hausa praise poetry

Hausa praise poetry is the panegyric verse and song of the Hausa people of Northern Nigeria and Niger, in which professional singers called maroka celebrate rulers, patrons, and hunters.

Hausa qasida

A Hausa qasida is an ode composed in Hausa, usually in Ajami Arabic script, following classical Arabic conventions of meter and rhyme, used since the seventeenth century.

Hausa riddles

Hausa riddles, known as kacici-kacici, are a verbal riddle game of the Hausa people of Northern Nigeria in which listeners guess a hidden object described in first person.

Hausa Sign Language

Hausa Sign Language (Maganar hannu) is the indigenous sign language of the Deaf community in Hausa-speaking northern Nigeria, centered on Kano; described by Schmaling (2000), it uses handshape, movement, location, and orientation parameters and predates ASL-based deaf education.

Hausdorff dimension

The Hausdorff dimension, also called the Hausdorff-Besicovitch dimension, is a possibly fractional measure of a set's size, introduced by Felix Hausdorff in 1918; the middle-third Cantor set has dimension log 2 / log 3.

Hausdorff distance

The Hausdorff distance, introduced by Felix Hausdorff in 1914, is a metric on compact subsets of a metric space, used in medical image segmentation and comparing point clouds.

Hausdorff maximal principle

The Hausdorff maximal principle, also called the Hausdorff maximality theorem, states that every chain in a partially ordered set is contained in a maximal chain, and is equivalent to Zorn's lemma.

Hausdorff measure

The Hausdorff measure is a family of measures introduced by Felix Hausdorff in 1918 that assigns sizes to sets of any dimension, including fractals, and extends the Lebesgue measures of length, area, and volume.

Hausdorff space

A Hausdorff space, also called a T2 space or separated space, is a topological space in which any two distinct points can be separated by disjoint neighborhoods.

Hausen (lunar crater)

Hausen is an IAU-recognized lunar impact crater, feature ID 2388, 163.24 km in diameter, centered at -65.11° latitude, -88.49° longitude in the Moon's southern hemisphere near the western limb.

Sep 19, 2026

Hauser & Wirth

Hauser & Wirth is a Swiss family-owned contemporary art gallery founded in Zurich in 1992 by Iwan and Manuela Wirth, representing over 90 artists and estates.

Hauser–Feshbach model

The Hauser–Feshbach model is a statistical theory of compound-nuclear reactions that conserves angular momentum and parity, used in codes like TALYS from kilovolts to tens of MeV.

Sep 29, 2026

Hausman test

The Hausman test is a statistical specification test in econometrics, introduced by J. A. Hausman in 1978, that compares two estimators and rejects the null when they diverge.

Hausmannite

Hausmannite is a brown-black manganese oxide mineral with the formula Mn²⁺Mn³⁺₂O₄, a tetragonally distorted spinel found in hydrothermal veins and metamorphosed manganese deposits.

Hausner ratio

The Hausner ratio is a dimensionless index of powder flowability, defined as a powder's tapped bulk density divided by its untapped bulk density; values near 1 indicate free flow.

Hauss Hejny

Hauss Hejny (Hoss HAY-nee), Colorado State quarterback from Aledo, Texas; former TCU and Oklahoma State QB, four-star 2024 recruit, two-time Texas 5A state champion, 2026 starter with 10 TD passes.

Haussmann's renovation of Paris

Haussmann's renovation of Paris, also known as Haussmannization, was a vast public works program commissioned by Napoleon III and directed by Georges-Eugène Haussmann between 1853 and 1870.

Haustorium

A haustorium, plural haustoria, is a specialized organ formed by fungi, oomycetes, and parasitic plants to draw nutrients from a living host plant while keeping host cells alive.

Haustrum (gastropod)

Haustrum, also Haustrinae rock shells, is a Perry 1811 genus of predatory muricid sea snails endemic to New Zealand and southern Australia, including H. haustorium, H. lacunosum, and the Oyster Borer H. scobina; unrelated namesakes include Pomacea haustrum and Argonauta haustrum.

Haut Niger Biosphere Reserve

Haut Niger Biosphere Reserve (Réserve de Biosphère du Haut Niger), a UNESCO MAB site designated in 2002 in Guinea around Haut Niger National Park; 776,550 ha of Niger-basin dry forest, savanna, and gallery forest protecting chimpanzees, manatees, and lions.

Haut Uele

Haut Uele (Haut-Uélé) is a northeastern province of the Democratic Republic of the Congo, with its capital at Isiro, bordering South Sudan and the Central African Republic.