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circumference

noun

cir·​cum·​fer·​ence sər-ˈkəm(p)-fərn(t)s How to pronounce circumference (audio)
sə-,
-f(ə-)rən(t)s
1
: the perimeter of a circle
The circle measures 22 inches in circumference.
2
: the external boundary or surface of a figure or object : periphery
from the center to the circumference of the sphere
circumferential adjective

Did you know?

Attempts have been made to measure the circumference of the earth since the time of Aristotle. The calculation that Columbus was relying on led him to think he could reach China by sailing west more quickly than by sailing east. But that measurement had calculated the earth's circumference as about a quarter too small, and the rest is history. Columbus wasn't the only one who got it wrong; many later attempts continued to produce different measurements for the earth's circumference—even though the Greeks had calculated it correctly way back in the 3rd century B.C.

Synonyms

Example Sentences

What is the circumference of the Earth at the equator? The circle is 38 inches in circumference. The fence marks the circumference of the field.
Recent Examples on the Web Make the pumpkin: For the face, cut two circles (around the same circumference as a cupcake liner) on light brown paper and glue them to the bottom of two white liners. Blair Donovan, Country Living, 12 Aug. 2022 Their tent was outside of the 75-foot circumference surrounding the polling place. The Arizona Republic, 3 Aug. 2022 It’s been manufactured since 2005 and can travel nearly 9,500 miles at a time, almost 40 percent of Earth’s circumference. Caroline Delbert, Popular Mechanics, 12 July 2022 During the first celebration, the Exploratorium's employees marched around one of the circular spaces of the museum because pi is the ratio of a circle's circumference to its diameter. Mary Kekatos, ABC News, 14 Mar. 2022 The layers are distinguished by their respective garnishes around the full circumference of the cake: fresh strawberries for the cheesecake layer, pecans for the pecan pie layer, and whole Nilla wafers for the banana pudding cake layer. Megha Mcswain, Chron, 26 July 2022 Crafted by Issac Poleon — who shared a bit of the styling process on his own Instagram grid — the pouf has a truly impressive circumference. Marci Robin, Allure, 22 June 2022 The circumference of our tree is 9.5 feet at about a foot off the ground and is our signature front yard tree that shades our house. oregonlive, 27 Mar. 2022 The tree is about 268 feet high, and the circumference of the trunk is 107 feet, second in size only to General Sherman. Los Angeles Times, 23 Dec. 2021 See More

Word History

Etymology

Middle English, from Middle French & Latin; Middle French, from Latin circumferentia, from circumferre to carry around, from circum- + ferre to carry — more at bear

First Known Use

14th century, in the meaning defined at sense 1

Time Traveler
The first known use of circumference was in the 14th century

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