| 释义 |
cir·cum·fer·ence
\sərˈkəm(p)fərn(t)s, -f(ə)rən(t)s, -R & often R səˈk-\ noun
(-s)
Etymology: Middle English, from Middle French circumference, circonference, from Latin circumferentia, from circumferre to carry around, from circum- + ferre to carry — more at bear
1. : the line that bounds a circular plane surface or the length of this line equal to π times the diameter : perimeter; broadly : periphery, circuit
2.
a. : the surface or outer limits of a sphere or rounded body : the measure of the perimeter of a great circle or sphere
< from the center to the circumference of the spheroid >
b. : limits, bounds
< within the circumference of a grain of sand >
< that mysterious intellectual magnetism that enlarges the circumference of his ego — J.C.Powys > |