In solid geometry, an ungula is a region of a solid of revolution, cut off by a plane oblique to its base.Ungula at Webster Dictionary.org A common instance is the spherical wedge. The term ungula refers to the hoof of a horse, an anatomical feature that defines a class of mammals called ungulates.
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The contribution of Opus Geometricum was in :making extensive use of spatial imagery to create a multitude of solids, the volumes of which reduce to a single construction depending on the ductus of a rectilinear figure, in the absence of [algebraic notation and integral calculus] systematic geometric transformation fulfilled an essential role. For example, the "ungula is formed by cutting a right circular cylinder by means of an oblique plane through a diameter of the circular base." And also the "’double ungula formed from cylinders with axes at right angles." Ungula was changed to "onglet" in French by Blaise Pascal when he wrote Traité des trilignes rectangles et leurs onglets.
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The volume of an ungula of a cylinder was calculated by Grégoire de Saint Vincent.Gregory of St. Vincent (1647) Opus Geometricum quadraturae circuli et sectionum coni Two cylinders with equal radii and perpendicular axes intersect in four double ungulae.Blaise Pascal Lettre de Dettonville a Carcavi describes the onglet and double onglet, link from HathiTrust The bicylinder formed by the intersection had been measured by Archimedes in The Method of Mechanical Theorems, but the manuscript was lost until 1906. A historian of calculus described the role of the ungula in integral calculus: :Grégoire himself was primarily concerned to illustrate by reference to the ungula that volumetric integration could be reduced, through the ductus in planum, to a consideration of geometric relations between the lies of plane figures.
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The Metropolitan Museum of Art, New York bechichie, or bechie, from the Ancient Greek word for "cough".Joannes de Vigo. Works of Chirurgery, 1543. Also ungula caballina ("horse hoof"), pes pulli ("foal's foot"), and chamæleuce.
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The name Toliman originates with Jacobus Golius' 1669 edition of Al-Farghani's Compendium. Tolimân is Golius' latinisation of the Arabic name "the ostriches", the name of an asterism of which Alpha Centauri formed the main star. During the 19th century, the northern amateur popularist Elijah H. Burritt used the now-obscure name Bungula, possibly coined from "β" and the Latin ungula ("hoof"). Together, Alpha and Beta Centauri form the "Southern Pointers" or "The Pointers", as they point towards the Southern Cross, the asterism of the constellation of Crux.
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The first instar larva in the beetle family Meloidae has three claws on each foot, and is therefore called a triungulin (plural triungula). The term is derived from the Latin tri meaning "three" and ungula meaning a claw. Note that an obsolescent variant form from the same root as "triungulin" is triungulus, plural triunguli and sometimes it still is encountered.Webster's international dictionary 1895 For practical purposes of uniform terminology, except where there is some special reason for the use of the more narrowly specific term "triungulin", it is best to use only the more general term "planidium".
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This star is relatively bright, but it was rarely included in old catalogues. Catalogues and atlases it was not included in are for example those by Ptolemy and all its derivatives and translations (by as-Sufi, al-Biruni, Ulugh Beg, Copernicus, Clavius etc.), Tycho Brahe, de Houtman, Bayer, Kepler, Schiller, Halley, Flamsteed (as well as published by Carolina Herschel in 1798 catalogue of stars, observed by Flamsteed, but not inserted in his British Catalogue), Bradley. Catalogues and atlases it was included in are those by Hevelius (1690) (65th in Ursa Major, designated In Ungula sinistri Pedis poster. trium sequens) and Bode (1801) (number 157 of Ursa Major).
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In the local legend, this reportedly extinct species, has been given a mythical status and is called 'Chui' and is part of the superstitious beliefs of the people. People believe that sorcerers keep this animal as their pet and scare people by spinning stories that the animal appears like spirits and disappears into thin air. It was last reported in 1999 and officials, and men working on the “coral rag” lands of the southern and eastern Ungula Island are assertive that the species is not extinct, though it has not been sighted since 2003. The last sighting reported in 2002-2003 was of two leopards.
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