1. The plural of ellipticity; the quality or degree of being elliptical in shape or form.
Usage: Commonly used in astronomy, physics, and mathematics to describe the deviation of orbits or objects from perfect circles.
2. In astronomy, measurements of how much planetary orbits or celestial bodies deviate from circular shapes.
Usage: Technical term used in astrophysics and orbital mechanics.

Examples

• The ellipticities of the planets in our solar system vary significantly.
• Astronomers measure the ellipticities of distant galaxies to understand their structure.
• The study compared the ellipticities of different comet orbits.
• High ellipticities indicate highly elongated orbital paths.
• Scientists calculated the ellipticities of the binary star system.