nouns
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"
is a type of (narrower)
a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it
"the sums of the distances from the foci to any point on an ellipse is constant"
an unofficial association of people or groups
"the smart set goes there"; "they were an angry lot"
something approximating the shape of a circle
"the chairs were arranged in a circle"
is a type of (narrower)
the spatial arrangement of something as distinct from its substance
"geometry is the mathematical science of shape"
movement once around a course
"he drove an extra lap just for insurance"
a road junction at which traffic streams circularly around a central island
"the accident blocked all traffic at the rotary"
street names for flunitrazepan
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"
any circular or rotating mechanism
"the machine punched out metal circles"