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r

PRIMARY MEANINGS OF: r

1
 n
the 18th letter of the Roman alphabet
2
 n
the length of a line segment between the center and circumference of a circle or sphere
FULL DEFINITIONS OF: r
1

n the 18th letter of the Roman alphabet

Synonyms:
R
Type of:
alphabetic character, letter, letter of the alphabet
the conventional characters of the alphabet used to represent speech
2

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

Synonyms:
radius
Types:
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
Type of:
length
the linear extent in space from one end to the other; the longest dimension of something that is fixed in place
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