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Definition of Radius in English :

Define Radius in English

Radius meaning in English

Meaning of Radius in English

Pronunciation of Radius in English

Radius pronunciation in English

Pronounce Radius in English

Radius

see synonyms of radius

Noun

1. r, radius

the length of a line segment between the center and circumference of a circle or sphere

2. radius

a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)

3. radius

a circular region whose area is indicated by the length of its radius

Example Sentences:
'they located it within a radius of 2 miles'

4. radius

the outer and slightly shorter of the two bones of the human forearm

5. radius, spoke, wheel spoke

support consisting of a radial member of a wheel joining the hub to the rim

WordNet Lexical Database for English. Princeton University. 2010.

Radius

see synonyms of radius
noun plural -dii (-dɪˌaɪ) or -diuses
1. 
a straight line joining the centre of a circle or sphere to any point on the circumference or surface
2. 
the length of this line, usually denoted by the symbol r
3. 
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
the outer and slightly shorter of the two bones of the human forearm, extending from the elbow to the wrist
5. 
a corresponding bone in other vertebrates
6. 
any of the veins of an insect's wing
7. 
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. 
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

Collins English Dictionary. Copyright © HarperCollins Publishers

Radius

see synonyms of radius
nounWord forms: plural ˈradiˌi (ˈreɪdiˌaɪ ; rāˈdēīˌ) or ˈradiuses
1. 
a raylike or radial part, as a spoke of a wheel
2. 
a. 
any straight line extending from the center to the periphery of a circle or sphere
b. 
the length of such a line
3. 
a. 
the circular area or distance limited by the sweep of such a line
no house within a radius of five miles
b. 
the distance a ship or airplane can travel and still return to its point of origin without refueling
4. 
an extent, scope, range, etc. of a limited or specified kind
within the radius of one's experience
5. 
a. 
the shorter and thicker of the two bones of the forearm on the same side as the thumb
b. 
a corresponding bone of the forelimb of a four-legged animal
6.  Zoology
a. 
any of the planes of division of the body of a radially symmetrical animal
b. 
any of various longitudinal veins in the wing of an insect

Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by Houghton Mifflin Harcourt. All rights reserved.

Radius

see synonyms of radius
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.

The American Heritage ® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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