plural arclengths
Definition of arclength
geometry
: the length of a segment of an arc
Thus, in a unit circle (radius = 1), any angle of 1 radian cuts off an arc of unit length. All other arclengths are proportional to this; for instance, doubling the radius (to 2) and tripling the angle (to 3 radians) yields an arclength of 6.— Rheta N. Rubenstein et al., Math Horizons, November 2003
Test Your Vocabulary
Odd Habits and Quirks
-
- Which of the following best describes an easily irritated person?

Test your visual vocabulary with our 10-question challenge!
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share arclength
Time Traveler for arclength
The first known use of arclength was in 1849
See more words from the same year