yuán​huán

annulus

圆环 (圓環) yuán​huán
annulus noun
the mathematical area between two concentric circles
ring noun
a ring-shaped or circular physical object
traffic circle place name
a circular road junction or rotary where traffic moves around a central island

Frequency

Movie subtitles
0.060 per million appears in 0% of films
Written text
0.765 per million

Sources

Definitions
CC-CEDICT