circumference
Concise Oxford English Dictionary © 2008 Oxford University Press:
circumference /səˈkʌmf(ə)r(ə)ns/
▶noun
- 1 the enclosing boundary of a circle.
- 2 the distance around something.
– derivatives
circumferential adjective,
circumferentially adverb.
circumferential adjective,
circumferentially adverb.
– origin ME: from OFr. circonference, from L. circumferentia, from circum ‘around’ + ferre ‘carry’.
'circumference' also found in these Oxford entries:
arc
- cardioid
- Catherine wheel
- clock golf
- deadeye
- epicycle
- epicycloid
- hip
- hypocycloid
- octant
- paddle
- paddle wheel
- penannular
- periphery
- pi
- radial
- radius
- semicircle
- whispering gallery

