ellipse in which the two axes are of equal length; a plane curve generated by one point moving at a constant distance from a fixed point
"he calculated the circumference of the circle"
an unofficial association of people or groups
同义词：
set
band
lot
something approximating the shape of a circle
"the chairs were arranged in a circle"
movement once around a course
同义词：
lap
circuit
a road junction at which traffic streams circularly around a central island
同义词：
traffic circle
rotary
roundabout
street names for flunitrazepan
同义词：
R-2
Mexican valium
rophy
rope
roofy
roach
forget me drug
a curved section or tier of seats in a hall or theater or opera house; usually the first tier above the orchestra
"they had excellent seats in the dress circle"
同义词：
dress circle
any circular or rotating mechanism
"the machine punched out metal circles"
同义词：
round