Meaning & Definition of word "Radius"
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Radius
/ˈreɪdiəs/
noun:
- 1. A straight line from the center to the circumference of a circle or sphere.
- Example: The radius of the circle is 5 centimeters.
- 2. The length of such a line.
- Example: To find the area of the circle, you need to calculate the radius.
- 3. A circle or sphere having a specified radius.
- Example: The design included a radius of 10 meters around the central fountain.
verb:
- 1. To extend or measure out in radius.
- Example: They decided to radius the search area to maintain efficiency.
Etymology
Latin 'radius' meaning 'spoke of a wheel' or 'ray of light'.
Common Phrases and Expressions
radius of action:
The area in which influence or activity occurs.
within a radius:
In proximity to a specified distance.
radius of influence:
The area in which one has power or ability to affect.
Related Words
diameter:
A straight line passing from side to side through the center of a figure, especially a circle.
circumference:
The enclosing boundary of a curved geometric figure, especially a circle.
arc:
A part of the circumference of a circle.