All articles starting with N
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Nilgiri tahr (வரையாடு)
Nilgiri tahr (வரையாடு, Nilgiritragus hylocrius), Endangered mountain ungulate endemic to the Western Ghats of Tamil Nadu and Kerala; sole member of its genus, sheep-related; about 2,668 remain, Eravikulam holds 841; state animal of Tamil Nadu.
Nilgiri-class frigate (2019)
Nilgiri-class frigate (Project 17A, P-17A): seven Indian stealth guided-missile frigates, follow-on to the Shivalik class, built 2019 onward by MDL and GRSE with integrated modular construction, about 75% indigenous content, CODOG propulsion, and BrahMos and Barak-8 armament.
Nilgiris district (நீலகிரி மாவட்டம்)
Nilgiris district (நீலகிரி மாவட்டம்), Tamil Nadu hill district headquartered at Udhagamandalam (Ooty); 735,394 people (2011), six taluks, highest Scheduled Tribe share in the state, Nilgiri Biosphere Reserve, tea plantations, and tourism.
Nili Brosh (נילי ברוש)
Nili Brosh (נילי ברוש), Israeli-American guitarist (born 1988, Rishon LeZion), Berklee 2009 summa cum laude; four solo albums through Eventide (2026); guitarist for Danny Elfman, Dethklok, and Cirque du Soleil's Michael Jackson ONE; Ibanez signature guitar "The Answer."
Nili Fossae
Nili Fossae is a graben system on the northwest edge of Mars' Isidis basin, near Syrtis Major, known for clays, olivine, the planet's largest carbonate deposit, possible methane, and Jezero crater, Perseverance's landing site.
Nili Planum
Nili Planum is a plateau in the cratered highlands northwest of Isidis Planitia on Mars, beside Jezero crater; IAU-named 2020, mapped at 1:75,000 by USGS SIM 3464, a Noachian landscape and Mars 2020 landing region.
Nilibhrngadi taila
Nilibhrngadi taila (Nīlībhṛṅgādi), or Neelibringadi Thailam, is a classical Ayurvedic medicated hair oil of sesame oil, four herb juices, and four milks, listed in the Ayurvedic Formulary of India for scalp massage against hair fall and greying.
Nilikadya Taila
Nilikadya Taila (नीलिकाद्य तैल), a classical Ayurvedic medicated sesame oil from Sharangdhar Samhita (AFI 8:25), applied externally for skin diseases, itching, and premature graying; standardized analytically in 2026.
Nilima Devi
Nilima Devi is an Indian politician from Assam and a BJP cabinet minister holding the Animal Husbandry and Veterinary and Fisheries portfolios, elected from Mangaldai in 2026.
Nilkant Halarnkar
Nilkant Halarnkar is an Indian politician from Goa, a Bharatiya Janata Party member who serves as a Goa minister for Fisheries, Animal Husbandry, and Factories and Boilers.
Nilla Pizzi
Nilla Pizzi, born Adionilla Pizzi, was an Italian singer who won the first Sanremo Festival in 1951 and swept the entire 1952 podium, a feat no other singer has matched.
Nilmani Phookan
Nilmani Phookan (নীলমণি ফুকন), often distinguished as Nilmani Phookan Jr., was an Indian poet who wrote in Assamese and won India's highest literary honor, the Jnanpith Award, in 2021.
Nilo-Saharan languages
Nilo-Saharan is a proposed African language phylum named by Joseph Greenberg in 1963, spanning the Niger to Ethiopia and northern Tanzania. Its unity and internal classification remain disputed; Glottolog does not recognize it as a family.
Nilokeras Fossa
Nilokeras Fossa is an IAU-approved fossa (trough system) on Mars at 24.74°N, 302.20°E, about 265-267 km across, approved in 1988 and named from a classical albedo feature.
Nilokeras Mensae
Nilokeras Mensae is a 450.88-km-wide mensa (flat-topped elevation) feature on Mars centered at 30.48°N, 308.05°E, named for an albedo feature and approved in 1988, distinct from Nilosyrtis and Nilus Mensae.
Nilokeras Scopulus
Nilokeras Scopulus is a roughly 756-km-long lobate cliff (scopulus) in Mars's northern hemisphere near 31.7N, 55.9W, IAU-approved in 1976 from Antoniadi's 1930 albedo feature 'Horn of the Nile.'
Nilosyrtis Mensae
Nilosyrtis Mensae is a fretted-terrain region of Mars on the dichotomy boundary in northwest Arabia Terra, near 34.7°N 68°E, about 676–705 km across, showing Amazonian glacial lineated valley fill, debris aprons, and hydrated silica deposits.
Nilotic languages
Nilotic languages are a group of some 40 to 55 African languages spoken in South Sudan, Ethiopia, Kenya, Uganda, and Tanzania, with an estimated 26 million speakers.
Nilotic peoples
Nilotic peoples are groups across South Sudan and East Africa defined by speaking Nilotic languages, including the Dinka, Nuer, Shilluk, Luo, Maasai, and Turkana, mostly semi-nomadic herders.
Nilotinib
Nilotinib, sold by Novartis as Tasigna, is a second-generation tyrosine kinase inhibitor that blocks BCR-ABL1 and treats Philadelphia chromosome-positive chronic myeloid leukemia, approved in 2007.
Nilphamari Zila District
Nilphamari Zila District (নীলফামারী জেলা) is a district of northern Bangladesh's Rangpur Division, named after an indigo farm established by British planters over two hundred years ago.
Nilpotent element
A nilpotent element of a ring is an element x whose some power x raised to n equals 0, making every nilpotent a zero divisor though not conversely, as with 2 in the integers mod 6.
Nilpotent group
A nilpotent group is a group whose lower central series, built by repeatedly taking commutators, reaches the trivial subgroup after finitely many steps; class 1 groups are exactly abelian.
Nilpotent Lie algebra
A nilpotent Lie algebra is a Lie algebra in which all iterated brackets of sufficient length equal zero, so it is nearly abelian and underlies nilpotent Lie groups.
Nilpotent matrix
A nilpotent matrix, or nilpotent transformation, is a square matrix for which some finite power is the zero matrix, and 0 is its only eigenvalue.
Nilradical
The nilradical of a commutative ring is the ideal of all nilpotent elements, also equal to the intersection of all prime ideals of the ring.
Nils Aaness
Nils Egil Aaness (1936–2024), Norwegian all-round speed skater. European All-round Champion 1963 in Göteborg, World bronze at Karuizawa, Big Combination world record 180.560, Oscar Mathisen Award 1963; Olympian 1960 and 1964.
Nils Adlercreutz
Nils Adlercreutz (1866–1955), Swedish cavalry colonel and Olympic equestrian; won team eventing gold on Atout at Stockholm 1912, fourth individually; father of Gregor Adlercreutz.
Nils Brose
Nils Brose (born 1962) is a German neuroscientist who directs Molecular Neurobiology at the Max Planck Institute for Multidisciplinary Sciences in Göttingen, studying synaptic vesicle priming and neurexin-neuroligin synapse proteins.
Nils Christian Stenseth
Nils Christian Stenseth, often published as Nils Chr. Stenseth, is a Norwegian population ecologist at the University of Oslo known for rodent cycles and climate effects on populations.