equator

equinoctial equinoctial circle equinoctial line

ring sphere

amphitheater aureole band belt bowl bracelet circlet circuit circumference circus cirque coil compass cordon corona crown cycle disc disk ecliptic enclosure globe halo hoop horizon lap meridian orbit perimeter periphery record revolution ringlet round stadium tire turn wheel wreath zodiac

colure full turn parallel of latitude

aureole band belt bowl bracelet circlet circuit circumference circus cirque coil compass cordon corona crown cycle disc disk ecliptic enclosure globe halo hoop horizon lap meridian orbit

colure full turn parallel of

arc arch band bend bow circle circlet curvature curve disc disk eye gyre hoop loop orb orbit ring ringlet sphere wheel

curvation

line

jungle

tropical zone