radius
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ra·di·us
(rā′dē-əs)n. pl. ra·di·i (-dē-ī′) or ra·di·us·es
1. Abbr. r or rad. Mathematics
a. A line segment that joins the center of a circle with any point on its circumference.
b. A line segment that joins the center of a sphere with any point on its surface.
c. A line segment that joins the center of a regular polygon with any of its vertices.
d. The length of any such line segment.
2. A circular area measured by a given radius: every family within a radius of 25 miles of the city center.
3. A bounded range of effective activity or influence: the operating radius of a helicopter.
4. A radial part or structure, such as a mechanically pivoted arm or the spoke of a wheel.
5. Anatomy
a. A long, prismatic, slightly curved bone in humans, the shorter and thicker of the two forearm bones, located on the lateral side of the ulna.
b. A similar bone in many other vertebrates.
[Latin, ray, spoke of a wheel, radius; see ray1.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
radius
(ˈreɪdɪəs)n, pl -dii (-dɪˌaɪ) or -diuses
1. (Mathematics) a straight line joining the centre of a circle or sphere to any point on the circumference or surface
2. (Mathematics) the length of this line, usually denoted by the symbol r
3. (Mathematics) the distance from the centre of a regular polygon to a vertex (long radius) or the perpendicular distance to a side (short radius)
4. (Anatomy) anatomy the outer and slightly shorter of the two bones of the human forearm, extending from the elbow to the wrist
5. (Zoology) a corresponding bone in other vertebrates
6. (Zoology) any of the veins of an insect's wing
7. (Botany) a group of ray florets, occurring in such plants as the daisy
8.
a. any radial or radiating part, such as a spoke
b. (as modifier): a radius arm.
9. (Mechanical Engineering) the lateral displacement of a cam or eccentric wheel
10. a circular area of a size indicated by the length of its radius: the police stopped every lorry within a radius of four miles.
11. the operational limit of a ship, aircraft, etc
[C16: from Latin: rod, ray, spoke]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ra•di•us
(ˈreɪ di əs)n., pl. -di•i (-diˌaɪ)
-di•us•es.
1. a straight line extending from the center of a circle or sphere to the circumference or surface: The radius of a circle is half the diameter.
2. the length of such a line.
3. any radial or radiating part.
4. a circular area having an extent determined by the length of the radius from a given or specified central point: every house within a radius of 50 miles.
5. a field or range of operation or influence.
6. extent of possible operation, travel, etc., as under a single supply of fuel.
7. the bone of the forearm on the thumb side.
8. a corresponding bone in the forelimb of other vertebrates.
[1590–1600; < Latin: staff, rod, spoke, beam, ray1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ra·di·us
(rā′dē-əs) Plural radii (rā′dē-ī′) or radiuses
1. A line segment that joins the center of a circle or sphere with any point on the circumference of the circle or the surface of the sphere. It is half the length of the diameter.
2. The shorter and thicker of the two bones of the forearm or the lower portion of the foreleg. See more at skeleton.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
radius
One of the two bones of the forearm.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
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Noun | 1. | radius - the length of a line segment between the center and circumference of a circle or sphere diam, diameter - the length of a straight line passing through the center of a circle and connecting two points on the circumference semidiameter - the apparent radius of a celestial body when viewed as a disc from the earth radius of curvature - the radius of the circle of curvature; the absolute value of the reciprocal of the curvature of a curve at a given point length - the linear extent in space from one end to the other; the longest dimension of something that is fixed in place; "the length of the table was 5 feet" |
2. | radius - a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere) straight line - a line traced by a point traveling in a constant direction; a line of zero curvature; "the shortest distance between two points is a straight line" | |
3. | radius - a circular region whose area is indicated by the length of its radius; "they located it within a radius of 2 miles" | |
4. | radius - the outer and slightly shorter of the two bones of the human forearm forearm - the part of the superior limb between the elbow and the wrist arm bone - a bone in the arm | |
5. | radius - support consisting of a radial member of a wheel joining the hub to the rim bicycle wheel - the wheel of a bicycle cartwheel - a wheel that has wooden spokes and a metal rim support - any device that bears the weight of another thing; "there was no place to attach supports for a shelf" wagon wheel - a wheel of a wagon |
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
نِصْف القُطر
poloměrokruh
afstandradius
sädevärttinäluu
hatósugár
radíusgeisli
polomer
polmer
yarı çapyarı çap çizgisi
radius
[ˈreɪdɪəs] N (radiuses, radii (pl)) → radio mwithin a radius of 50 miles → en un radio de 50 millas
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
Collins English/French Electronic Resource. © HarperCollins Publishers 2005
radius
n pl <radii>
(Math) → Radius m, → Halbmesser m; (of ship, aircraft) → Aktionsradius m, → Wirkungsbereich m; within a 6 km radius (of Hamburg) → in einem Umkreis von 6 km (von Hamburg)
(Anat) → Speiche f
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
radius
[ˈreɪdɪəs] n (radii (pl)) [ˈreɪdɪaɪ] (Math) (fig) → raggio (Anat) → radiowithin a radius of 50 miles → in un raggio di 50 miglia
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
radius
(ˈreidiəs) noun1. (plural ˈradiuses) the area within a given distance from a central point. They searched within a radius of one mile from the school.
2. (plural ˈradii (-diai) ) a straight line from the centre of a circle to its circumference.
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.
ra·di·us
n. radio.
1. hueso largo del antebrazo;
2. línea recta que une el centro y cualquier punto de la circunferencia.
English-Spanish Medical Dictionary © Farlex 2012
radius
n (pl radii) radioEnglish-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.