https://nl.mathworks.com/help/map/ref/minaxis.html
minaxis - Semiminor axis of ellipse - MATLAB
This MATLAB function computes the semiminor axis length b of an ellipse or an ellipsoid of revolution given the semimajor axis length semimajor and...
axisellipsematlab
https://www.merriam-webster.com/dictionary/semiminor%20axis
SEMIMINOR AXIS Definition & Meaning - Merriam-Webster
The meaning of SEMIMINOR AXIS is one half of the minor axis of an ellipse (such as that formed by the orbit of a planet).
axisdefinitionmeaningmerriamwebster