Definition of semimajor axis in English:

semimajor axis

Line breaks: semi|major axis

noun

Geometry
Either of the halves of the major axis of an ellipse.
More example sentences
  • The initial covariance matrices of each lander were set to correspond to a 15 by 8 kilometer landing ellipse with a semimajor axis in the East-West direction.
  • The speed of the satellite is inversely proportional to the square root of the radius of the orbit (or more strictly the semimajor axis of the orbit).
  • Kepler's third law of planetary motion says that the square of the planet's orbital period is proportional to the cube of its semimajor axis.

Definition of semimajor axis in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day flippant
Pronunciation: ˈflɪp(ə)nt
adjective
not showing a serious or respectful attitude