English

Shelf cloud, a type of arcus

Noun

arcus ‎(plural arci)

1. (medicine) A white band of cholesterol that forms at the edge of the cornea
2. (meteorology) A low, horizontal cloud typically forming at the leading edge of thunderstorm outflow
3. (entomology) An elastic band around the base of the arolium, a pad at the end of the leg of certain insects
4. (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

Anagrams

• carus, scaur

Latin

Etymology

From Proto-Indo-European *h₂erkʷo- ‎(“bow, arrow”). Cognate to Old English earh, whence English arrow.

Pronunciation

• (Classical) IPA^(key): /ˈar.kus/

Noun

arcus m ‎(genitive arcūs); fourth declension

1. arc
2. bow (arc-shaped weapon used for archery)
3. rainbow

Inflection

Fourth declension, dative/ablative plural in -ubus.

Derived terms

• *arciō
• arcuō
• ballistārius arcūs

Related terms

• arcuātus

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’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
• Félix Gaffiot (1934), “arcus”, in Dictionnaire Illustré Latin-Français, Paris: 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