radius
English edit
Etymology edit
Borrowed from Latin radius (“ray”). Doublet of ray.
Pronunciation edit
Noun edit
radius (plural radii or radiuses)
- (anatomy) The long bone in the forearm, on the side of the thumb.
- 1808, John Barclay, The Muscular Motions of the Human Body[1], →OCLC, page 396:
- It is also obvious, and proved by experiment, that the rotatory motions observed in the hand proceed from the rotatory motions of the radius.
- (zoology) The lighter bone (or fused portion of bone) in the forelimb of an animal.
- (entomology) One of the major veins of the insect wing, between the subcosta and the media; the vein running along the costal edge of the discal cell.
- (geometry) A line segment between any point of a circle or sphere and its center.
- Fatima claims to have visited all the bars within a five-mile radius of her Manhattan apartment.
- (geometry) The length of this line segment.
- Anything resembling a radius, such as the spoke of a wheel, the movable arm of a sextant, or one of the radiating lines of a spider's web.
- 1674, Robert Hooke, Animadversions on the Firſt Part of the Machina Coelestis of the […] Aſtronomer Johannes Hevelius […] [2], page 43:
- […] I can do more with a Quadrant, Sextant or Octant, of 1 foot Radius, furniſhed with Teleſcopical Sights and Screws, then [sic] can poſſibly be done with any other Inſtrument, furniſhed only with Common Sights, though 10, 20, 30, nay threeſcore foot Radius; […]
Synonyms edit
- (vein of insect wing): R
Derived terms edit
Related terms edit
Translations edit
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Verb edit
radius (third-person singular simple present radiuses, present participle radiusing, simple past and past participle radiused)
- (transitive) To give a rounded edge to.
- 2014, Anil Mital, Anoop Desai, Anand Subramanian, Product Development, page 358:
- A comfortable grip is ensured by smoothing the surface of the handle and radiusing the edge.
See also edit
- ulna
- semidiameter
- Radius on Wikipedia.Wikipedia
- Radius (bone) on Wikipedia.Wikipedia
Anagrams edit
Crimean Tatar edit
Other scripts | |
---|---|
Cyrillic | радиус |
Roman |
Etymology edit
Borrowed from Russian радиус (radius), from Latin radius.
Noun edit
radius
- radius (line segment or length of this line segment)
Declension edit
singular | plural | |
---|---|---|
nominative | radius | radiuslar |
genitive | radiusnıñ | radiuslarnıñ |
dative | radiusqa | radiuslarğa |
accusative | radiusnı | radiuslarnı |
locative | radiusta | radiuslarda |
ablative | radiustan | radiuslardan |
References edit
Danish edit
Etymology edit
Noun edit
radius c (singular definite radien or radiusen, plural indefinite radier or radiuser)
References edit
- “radius” in Den Danske Ordbog
Esperanto edit
Verb edit
radius
- conditional of radii
Faroese edit
Noun edit
radius m (genitive singular radius, plural radiusar)
Declension edit
m52 | Singular | Plural | ||
Indefinite | Definite | Indefinite | Definite | |
Nominative | radius | radiusin | radiusar | radiusarnir |
Accusative | radius | radiusin | radiusar | radiusarnar |
Dative | radiusi | radiusinum | radiusum | radiusunum |
Genitive | radius | radiussins | radiusa | radiusanna |
French edit
Etymology edit
Borrowed from Latin radius. Doublet of rai, which was inherited.
Pronunciation edit
Noun edit
radius m (plural radius)
Further reading edit
- “radius”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.
Anagrams edit
Ido edit
Verb edit
radius
- conditional of radiar
Indonesian edit
Etymology edit
Learned borrowing from Latin radius.
Pronunciation edit
Noun edit
radius (first-person possessive radiusku, second-person possessive radiusmu, third-person possessive radiusnya)
- radius:
- (mathematics) a line segment between any point of a circle or sphere and its center; the length of this line segment.
- Synonym: jari-jari
- (anatomy) the long bone in the forearm, on the side of the thumb.
- Synonym: pengumpil
- (mathematics) a line segment between any point of a circle or sphere and its center; the length of this line segment.
- area of a circle, commonly with epicenter as center.
Derived terms edit
Further reading edit
- “radius” in Kamus Besar Bahasa Indonesia, Jakarta: Agency for Language Development and Cultivation — Ministry of Education, Culture, Research, and Technology of the Republic Indonesia, 2016.
Latin edit
Etymology edit
Of uncertain origin.[1] Some connect it with rādīx and rāmus. Tucker suggests Proto-Indo-European *neredʰ- (“extend forth, rise, outward”) akin to Sanskrit वर्धते (vardhate, “rise, grow”), or from Ancient Greek ἄρδις (árdis, “sharp point”).[2] May ultimately be from Proto-Indo-European *reh₁t- (“bar, beam, stem”).
Pronunciation edit
- (Classical) IPA(key): /ˈra.di.us/, [ˈräd̪iʊs̠]
- (modern Italianate Ecclesiastical) IPA(key): /ˈra.di.us/, [ˈräːd̪ius]
Noun edit
radius m (genitive radiī or radī); second declension
- a staff, rod
- a ray of light (also reflected)
- (according to an ancient theory of vision) a ray extending from the eye to the object seen
- the name of an elongated variety of olive
- the name of a rod with which geometers make figures in dust, also known as a virga
Declension edit
Second-declension noun.
Case | Singular | Plural |
---|---|---|
Nominative | radius | radiī |
Genitive | radiī radī1 |
radiōrum |
Dative | radiō | radiīs |
Accusative | radium | radiōs |
Ablative | radiō | radiīs |
Vocative | radie | radiī |
1Found in older Latin (until the Augustan Age).
Derived terms edit
Descendants edit
- → Albanian: rreze
- Aromanian: aradzã, radzã
- Catalan: raig
- →? Sardinian: raxu
- Dalmatian: rus, ruaz
- Old French: rai
- Friulian: rai
- Galician: raia, raio, raxo
- Italian: raggio
- Mirandese: raio
- Mozarabic: ראיה (rʔyh)
- Occitan: rai
- Portuguese: raia, raio
- Romanian: rază
- Sardinian: (ar)raju, (ar)rag(g)iu, arràciu, ràdiu
- Sicilian: raju
- Sicilian: raggiu (italianized, palatalized variant)
- Spanish: raya, rayo, raza
- Venetian: rajo
- → Welsh: rhaidd
- Learned borrowings
References edit
- ^ De Vaan, Michiel (2008) “radius”, in Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill, →ISBN, page 512
- ^ Tucker, T.G., Etymological Dictionary of Latin, Ares Publishers, 1976 (reprint of 1931 edition).
Further reading edit
- “radius” on page 1731 of the Oxford Latin Dictionary (2nd ed., 2012)
- “radius”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
- “radius”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
- radius 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)
- radius in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.
- “radius”, in Harry Thurston Peck, editor (1898), Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
- “radius”, in William Smith et al., editor (1890), A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin
Norwegian Bokmål edit
Etymology edit
Noun edit
radius m (definite singular radien or radiusen, indefinite plural radier, definite plural radiene)
References edit
- “radius” in The Bokmål Dictionary.
Norwegian Nynorsk edit
Etymology edit
Noun edit
radius m (definite singular radiusen, indefinite plural radiusar, definite plural radiusane)
References edit
- “radius” in The Nynorsk Dictionary.
Romanian edit
Etymology edit
Borrowed from French radius, Latin radius. Compare the inherited doublet rază (“ray”).
Noun edit
radius n (plural radiusuri)