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Audio English.org » Dictionary » R » Radioactive ... Raffia Farinifera

RADIUS (radii)

Pronunciation (US): 

 Dictionary entry overview: What does radius mean? 

RADIUS (noun)
  The noun RADIUS has 5 senses:

1. the length of a line segment between the center and circumference of a circle or sphere
2. a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)
3. a circular region whose area is indicated by the length of its radius
4. the outer and slightly shorter of the two bones of the human forearm
5. support consisting of a radial member of a wheel joining the hub to the rim

  Familiarity information: RADIUS used as a noun is common.


 Dictionary entry details 


RADIUS (noun)


Sense 1radius [BACK TO TOP]

Meaning:

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

Classified under:

Nouns denoting attributes of people and objects

Synonyms:

radius; r

Hypernyms ("radius" is a kind of...):

length (the linear extent in space from one end to the other; the longest horizontal dimension of something that is fixed in place)

Hyponyms (each of the following is a kind of "radius"):

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)

Holonyms ("radius" is a part of...):

diam; diameter (the length of a straight line passing through the center of a circle and connecting two points on the circumference)


Sense 2radius [BACK TO TOP]

Meaning:

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

Classified under:

Nouns denoting two and three dimensional shapes

Hypernyms ("radius" is a kind of...):

straight line (a line traced by a point traveling in a constant direction; a line of zero curvature)


Sense 3radius [BACK TO TOP]

Meaning:

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

Classified under:

Nouns denoting spatial position

Context example:

they located it within a radius of 2 miles

Hypernyms ("radius" is a kind of...):

part; region (the extended spatial location of something)


Sense 4radius [BACK TO TOP]

Meaning:

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

Classified under:

Nouns denoting body parts

Hypernyms ("radius" is a kind of...):

arm bone (a bone in the arm)

Holonyms ("radius" is a part of...):

forearm (the part of the superior limb between the elbow and the wrist)


Sense 5radius [BACK TO TOP]

Meaning:

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

Classified under:

Nouns denoting man-made objects

Synonyms:

spoke; wheel spoke; radius

Hypernyms ("radius" is a kind of...):

support (any device that bears the weight of another thing)

Holonyms ("radius" is a part of...):

bicycle wheel (the wheel of a bicycle)

cartwheel (a wheel that has wooden spokes and a metal rim)

wagon wheel (a wheel of a wagon)


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 RADIUS: related words searches 

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