arcus
English
![](Images/wiktionary/Rolling-thunder-cloud.jpg.webp)
Shelf cloud, a type of arcus
Etymology
Borrowed from Latin arcus. Doublet of arc and arco. Distantly related to arrow.
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 senilis
Translations
a white band of cholesterol that forms at the edge of the cornea
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Anagrams
- Curas, carus, scaur
Latin
Etymology
From Proto-Indo-European *h₂erkʷos (“bow, arrow”). Cognate to Old English earh, whence English arrow.
Pronunciation
- (Classical) IPA(key): /ˈar.kus/, [ˈärkʊs̠]
- (Ecclesiastical) IPA(key): /ˈar.kus/, [ˈärkus]
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).
Case | Singular | Plural |
---|---|---|
Nominative | arcus | arcūs |
Genitive | arcūs | arcuum |
Dative | arcuī | arcubus |
Accusative | arcum | arcūs |
Ablative | arcū | arcubus |
Vocative | arcus | arcūs |
Derived terms
- arcifer
- *arciō
- arcipotens
- arcisellium
- arcitenens
- arcuō
- ballistārius arcūs
Related terms
- arcuātus
Descendants
- Albanian: hark
- Aromanian: arcu
- English: arch
- Esperanto: arko
- Old French: arc
- → Middle English: ark, arke
- English: arc
- French: arc
- → Middle English: ark, arke
- Padanian:
- Friulian: arc
- Ligurian: erco
- Piedmontese: erch, erche
- Romansch: artg, arch
- Middle Low German: ark
- Low German: ark
- Norwegian Bokmål: ark
- Low German: ark
- Occitano-romance:
- Occitan: arc
- Catalan: arc
- Romanian: arc
- Russian: а́рка f (árka)
- Sardinian: alcu, arcu
- Italo-Dalmatian:
- Italian: arco
- Sicilian: arcu
- Ibero-romance:
- Asturian: arcu
- Spanish: arco
- Portuguese: arco
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’s 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 (accessed 16 July 2016) Neulateinische Wortliste: Ein Wörterbuch des Lateinischen von Petrarca bis 1700, 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