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radii    
n.
pl. 半径

半径

Radii \Ra"di*i\ (r[=a]"d[i^]*[imac]), n.,
pl. of {Radius}.
[1913 Webster]


Radius \Ra"di*us\ (r[=a]"d[i^]*[u^]s), n.; pl. L. {Radii}
(r[=a]"d[i^]*[imac]); E. {Radiuses}
(r[=a]"d[i^]*[u^]s*[e^]z). [L., a staff, rod, spoke of a
wheel, radius, ray. See {Ray} a divergent line.]
1. (Geom.) A right line drawn or extending from the center of
a circle to the periphery; the semidiameter of a circle or
sphere.
[1913 Webster]

2. (Anat.) The preaxial bone of the forearm, or brachium,
corresponding to the tibia of the hind limb. See Illust.
of {Artiodactyla}.
[1913 Webster]

Note: The radius is on the same side of the limb as the
thumb, or pollex, and in man it is so articulated that
its lower end is capable of partial rotation about the
ulna.
[1913 Webster]

3. (Bot.) A ray, or outer floret, of the capitulum of such
plants as the sunflower and the daisy. See {Ray}, 2.
[1913 Webster]

4. pl. (Zool.)
(a) The barbs of a perfect feather.
(b) Radiating organs, or color-markings, of the radiates.
[1913 Webster]

5. The movable limb of a sextant or other angular instrument.
--Knight.
[1913 Webster]

{Radius bar} (Mach.), a bar pivoted at one end, about which
it swings, and having its other end attached to a piece
which it causes to move in a circular arc.

{Radius of curvature}. See under {Curvature}.
[1913 Webster]


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  • RAYUS Radiology | Experts in Quality Imaging
    As a leader in advanced diagnostic and interventional radiology, RAYUS Radiology is the art and science of health and well-being We are revolutionizing radiology with brilliant medicine, our brilliant team, and brilliant technology and services so that we can all shine more brilliantly
  • RADII Definition Meaning - Merriam-Webster
    The meaning of RADII is plural of radius
  • Radius vs. Radii: What’s the Difference?
    "Radius" is the distance from the center of a circle to its edge, while "Radii" is the plural form of "Radius," indicating multiple such distances Radius is a term that originates from geometry It signifies the distance from the center of a circle to any point on its circumference
  • RADII - Transcend boundaries
    RADII (rā'dē-ī’) is an independent media platform dedicated to bridging the East and West by shining a light on topics and issues that connect a new generation of changemakers
  • Radii - definition of radii by The Free Dictionary
    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
  • RADII | definition in the Cambridge English Dictionary
    Different rare-earth elements have different atomic radii (size) The star is about 70 percent more massive than the sun and has a radius of 1 38 solar radii The simple reason for energy steps is because angular momentum can only resonate at certain diameters or radii The ellipses show the locations of the gaps (radii of 30 and 70 au)
  • What is the difference between a radii and radius? - Answers
    In geometry, a radius is a line segment that connects the center of a circle to any point on its circumference The plural form of radius is radii, which refers to more than one radius within the
  • Radius vs. Radii: Whats the Difference? - Main Difference
    In classical geometry, a radius of a circle or sphere is any of the line segments from its center to its perimeter, and in more modern usage, it is also their length The name comes from the Latin radius, meaning ray but also the spoke of a chariot wheel
  • RADII definition and meaning | Collins English Dictionary
    Wheel static, kinematic and dynamic radii depend on the tyre deformation radii and, consequently, predefine the mover output-input ratio
  • RADII Definition Meaning | Dictionary. com
    As a class, such stars are among the largest in the universe, with radii up to 1,500 times that of our sun and masses of up to 40 times larger than our home star Radii definition: See examples of RADII used in a sentence





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