ellipse

arc arch contour loop trajectory

ambit bend bight bow camber catenary chord circle circuit circumference compass concavity crook curlicue curvature festoon flexure hairpin half-moon helix horseshoe hyperbola incurvation incurvature meniscus ogee parabola quirk round sinuosity sweep swerve turn vault whorl

curvation rondure

line

path pattern rotation trajectory

apogee circle course curve cycle lap locus perigee round track

circumgyration