arcus

== English == === Etymology === Borrowed from Latin arcus. Doublet of arc and arco. Distantly related to arrow. === Pronunciation === (General American) IPA(key): /ˈɑɹkəs/ (Received Pronunciation) IPA(key): /ˈɑːkəs/ === Noun === arcus (plural arcus) (medicine) A white band of cholesterol that forms at the edge of the cornea (meteorology) A low, horizontal cloud typically forming at the leading edge of thunderstorm outflow (entomology) An elastic band around the base of the arolium, a pad at the end of the leg of certain insects (palynology) An arc-shaped band of thickened sexine extending between two apertures on a pollen grain or spore ==== Related terms ==== arc arcuate arcus juvenilis arcus inguinalis arcus senilis ==== Translations ==== === Anagrams === Curas, carus, scaur == Latin == === Alternative forms === arquus (Old Latin) === Etymology === From Proto-Italic *arkuos (“bow”), from Proto-Indo-European *h₂erkʷos (“bow, arrow”). Cognate to Old English earh, whence English arrow, as well as Proto-Slavic *orkyta (“willow”) and Ancient Greek ἄρκευθος (árkeuthos, “juniper”), owing to juniper and willow twigs being used to make bows due to their flexibility. === Pronunciation === (Classical Latin) IPA(key): [ˈar.kʊs] (modern Italianate Ecclesiastical) IPA(key): [ˈar.kus] === Noun === arcus m (genitive arcūs); fourth declension arc, arch bow (arc-shaped weapon used for archery) rainbow ==== Declension ==== Fourth-declension noun (dative/ablative plural in -ubus). ==== Derived terms ==== ==== Related terms ==== ==== Descendants ==== ==== See also ==== discus sagitta === References === “arcus”, in Charlton T. Lewis and Charles Short (1879), A Latin Dictionary, Oxford: Clarendon Press “arcus”, in Charlton T. Lewis (1891), An Elementary Latin Dictionary, New York: Harper & Brothers "arcus", in Charles du Fresne du Cange, Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887) “arcus”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette. “arcus”, in Harry Thurston Peck, editor (1898), Harper’s Dictionary of Classical Antiquities, New York: Harper & Brothers arcus in Ramminger, Johann (16 July 2016 (last accessed)), Neulateinische Wortliste: Ein Wörterbuch des Lateinischen von Petrarca bis 1700‎[1], pre-publication website, 2005-2016 “arcus”, in William Smith et al., editor (1890), A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin