1. vicious circle an argument that assumes that which is to be proved
  2. vicious cycle one trouble leads to another that aggravates the first
  3. winner's circle a small area at a racecourse where awards are given to the owners of winning horses
  4. semicircle a plane figure with the shape of half a circle
  5. dress circle a curved section or tier of seats in a hall or theater or opera house; usually the first tier above the orchestra
  6. family circle rearmost or uppermost area in the balcony containing the least expensive seats
  7. fairy circle a ring of fungi marking the periphery of the perennial underground growth of the mycelium
  8. viciously in a brutal manner
  9. hour circle a great circle on the celestial sphere that passes through both celestial poles
  10. vivacious vigorous and animated
  11. vertical circle a great circle on the celestial sphere passing through the zenith and perpendicular to the horizon
  12. precious coral the hard stony skeleton of a Mediterranean coral that has a delicate red or pink color and is used for jewelry
  13. auspicious indicating favorable circumstances and good luck
  14. inner circle an exclusive circle of people with a common purpose
  15. color circle a chart in which complementary colors (or their names) are arranged on opposite sides of a circle
  16. back circle a feat in which an acrobat arches the back from a prone position and bends the knees until the toes touch the head
  17. vicious having the nature of evildoing
  18. dip circle a measuring instrument for measuring the angle of magnetic dip (as from an airplane)
  19. circle ellipse in which the two axes are of equal length
  20. viceregal of or relating to a viceroy