noun
- plural of semidiameter; half the diameter of a circle or sphere; the radius
Usage: technical; geometry
Examples
- The astronomer calculated the semidiameters of both planets.
- In the geometric proof, we compared the semidiameters of the two circles.
- The semidiameters of the Earth at the equator and poles differ slightly.
- Students measured the semidiameters of various spherical objects.
- The formula requires the semidiameters of all three circles.
- Ancient mathematicians used semidiameters in their calculations.