circumference
/səˈkʌmfərəns/noun
1- the enclosing boundary of a curved geometric figure, especially a circle周线（尤指圆周线）。
1.1
- the distance around something周围：
babies who have small head circumferences
头围很小的婴儿们
mass noun two inches in circumference.周长二英寸。
1.2
- the edge or region which entirely surrounds something周边; 周边地带：
petals on the circumference are larger than those in the centre.
位于周边的花瓣要比中间的大些。
派生词
circumferential
adjectivecircumferentially
adverb词源
late Middle English: from Old French circonference, from Latin circumferentia, from circum 'around, about' + ferre 'carry, bear'.