noun, noun which may take the genitive case particle 'no'
prolate spheroid
A mathematical term for an ellipsoid of revolution where the polar axis is longer than the equatorial diameter. Used in geometry and physics.
The shape of a rugby ball is close to a prolate spheroid.
Do you remember the formula for calculating the volume of a prolate spheroid?
Compound of 長 (long) and 球 (sphere), literally 'long sphere'. A modern mathematical coinage.