different between sexine vs arcus

English

Etymology

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

Noun

sexine (plural sexines)

1. (palynology) The outer part of the exine, the outer covering of a pollen grain

Coordinate terms

• nexine
• ectexine
• endexine

Derived terms

• sexinal

Anagrams

• exines

English

Etymology

Borrowed from Latin arcus. Doublet of arc and arco. Distantly related to arrow.

Noun

arcus (plural arc?s)

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

• Curas, carus, scaur

Latin

Etymology

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

Pronunciation

• (Classical) IPA^(key): /?ar.kus/, [?ärk?s?]
• (Ecclesiastical) IPA^(key): /?ar.kus/, [??rkus]

Noun

arcus m (genitive arc?s); fourth declension

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

Declension

Fourth-declension noun (dative/ablative plural in -ubus).

Derived terms

Related terms

• arcu?tus

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)
• 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?^[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